DEV Community: Sameer

Why Mobile-Friendly Websites Matter

Sameer — Tue, 13 Oct 2026 08:02:15 +0000

Today, many people browse websites using smartphones. They search for local businesses, compare products, read articles, book appointments, and contact service providers directly from their mobile devices.

If a website is difficult to navigate on a small screen, visitors may leave before finding the information they need.

That's why having a mobile-friendly website is an important part of modern web development, user experience, and technical SEO.

In this article, we'll explore what makes a website mobile-friendly, why it matters, and how to improve your website for mobile users.

What Is a Mobile-Friendly Website?

A mobile-friendly website is designed to work properly on different screen sizes, including smartphones, tablets, laptops, and desktop computers.

A good mobile experience typically includes:

Readable text without zooming in.

Buttons that are easy to tap.

Content that fits the screen without unnecessary horizontal scrolling.

Images that resize correctly.

Navigation that works on touchscreens.

Forms that are simple to complete on mobile devices.

A website doesn't need a separate mobile version to achieve these goals. Responsive web design allows a single website to adapt to different screen sizes.

Mobile-Friendly Design Improves User Experience

Imagine someone visiting a restaurant website to find its address and contact number. If the text is too small, the menu is difficult to use, and the contact button is hard to tap, the visitor may struggle to complete a simple task.

A well-designed mobile website makes information easier to find and actions easier to complete.

To improve usability:

Keep navigation simple.

Use readable font sizes.

Provide sufficient spacing between interactive elements.

Make important information easy to locate.

Avoid intrusive pop-ups that block the content.

The goal is to help visitors complete their tasks with as little friction as possible.

Mobile Usability Matters for SEO

Google primarily uses the mobile version of a website's content for indexing. This means that important content, metadata, and relevant information should be accessible on the mobile version of your pages.

A responsive design can help maintain a consistent experience across devices.

However, mobile-friendliness alone does not guarantee higher search rankings. Search visibility depends on multiple factors, including relevance, content quality, technical accessibility, and competition.

If you're also working on technical SEO, read our guide on Understanding Core Web Vitals: A Beginner-Friendly Guide to learn about loading performance, responsiveness, and visual stability.

Responsive Design Makes Websites Adaptable

Responsive web design helps a website adjust its layout based on the available screen space.

Developers commonly use CSS media queries, flexible layouts, and responsive images to achieve this.

For example:

This viewport declaration helps browsers display the page at the device's CSS width instead of using a wider virtual viewport and scaling the page down.

You can also use CSS media queries to adjust layouts for smaller screens:

.container {
display: grid;
grid-template-columns: repeat(2, minmax(0, 1fr));
gap: 20px;
}

@media (max-width: 600px) {
.container {
grid-template-columns: 1fr;
}
}

In this example, the layout displays two columns when space permits and switches to one column on screens up to 600 pixels wide.

The exact breakpoint should depend on where your content needs a layout change, rather than on a specific device model.

Page Speed Is Important on Mobile Devices

Mobile visitors may have slower network connections or less powerful devices than desktop users. Large images, unnecessary JavaScript, and inefficient page layouts can make a website feel slow.

Some practical ways to improve performance include:

Compressing images while maintaining acceptable visual quality.

Using modern image formats where appropriate.

Reducing unnecessary JavaScript.

Enabling suitable caching.

Improving server response times.

Avoiding unnecessary third-party scripts.

For practical techniques, read our guide on How to Optimize Images Without Sacrificing Quality.

You can also test important pages using Google PageSpeed Insights.

Mobile-Friendly Websites Help Local Businesses

Mobile usability is particularly important for local businesses.

Consider someone searching for a nearby dentist, gym, restaurant, or repair service. They may want to check opening hours, view services, get directions, or call the business immediately.

A business website should make these actions straightforward.

Helpful features include:

A clearly displayed phone number.

Easy-to-find business hours and address.

Simple contact forms.

Readable service descriptions.

Fast-loading images.

Clear navigation to important pages.

A mobile-friendly website cannot guarantee more customers, but it can reduce usability barriers for people who want to contact or visit a business.

Accessibility Is Part of Mobile Usability

Mobile-friendly design should also support people with different accessibility needs.

Consider the following practices:

Use sufficient color contrast.

Provide descriptive labels for form fields.

Add appropriate alternative text to meaningful images.

Make interactive elements usable with a keyboard where relevant.

Avoid communicating important information through color alone.

Ensure buttons and links have clear purposes.

These improvements can make a website easier to use across devices and assistive technologies.

How to Test Your Website on Mobile

You don't need to guess whether your website works well on smartphones.

Try this practical checklist:

Step 1: Test on a real phone. Open important pages and complete common tasks, such as finding contact details or submitting a form.

Step 2: Check different screen sizes. Use your browser's responsive design tools to inspect narrower and wider layouts.

Step 3: Look for horizontal scrolling. Unintended horizontal scrolling may indicate that an element is wider than the viewport.

Step 4: Test buttons and menus. Make sure links, navigation menus, and forms work correctly with touch input.

Step 5: Measure performance. Use Google PageSpeed Insights to review performance diagnostics and available real-user data.

Step 6: Fix issues and retest. Prioritize problems that prevent visitors from reading content or completing important actions.

You should also check for broken URLs and missing pages. Our guide on How to Find and Fix Broken Links on a Website explains how to identify and resolve those issues.

Common Mobile Design Mistakes to Avoid

Some common problems include:

Using fixed-width layouts that overflow small screens.

Displaying desktop-sized images without responsive alternatives.

Making buttons too small or placing them too close together.

Hiding important content on mobile.

Using pop-ups that are difficult to dismiss.

Loading unnecessary scripts and large files.

Testing only on one device or browser.

Regular testing helps catch these issues before they affect more visitors.

How to Optimize Images Without Sacrificing Quality.

Sameer — Tue, 13 Oct 2026 07:56:48 +0000

Images make websites more engaging, explain complex ideas, and help visitors understand products and services. However, large image files can slow down page loading and affect the user experience.

The challenge is to reduce image file sizes without making images look blurry, pixelated, or unprofessional.

In this guide, we'll explore practical ways to optimize website images while maintaining their visual quality.

Why Is Image Optimization Important?

Unoptimized images can increase page weight, consume more bandwidth, and make websites slower, especially on mobile connections.

Image optimization can help you:

Improve page loading performance.

Reduce bandwidth usage.

Deliver a better mobile experience.

Support better user engagement.

Improve the overall technical foundation of your SEO strategy.

Image optimization is one part of website performance. To understand the bigger picture, read our guide to Understanding Core Web Vitals: A Beginner-Friendly Guide.

Choose the Right Image Format

Different image formats work better for different situations.

JPEG

JPEG is useful for photographs and complex images with many colors. It supports lossy compression, which reduces file size by discarding some image data.

PNG

PNG is useful for screenshots, graphics, and images that need lossless compression or transparency. However, PNG files can be large when used for photographs.

WebP

WebP supports both lossy and lossless compression. It can provide smaller files than older formats while maintaining good visual quality.

AVIF

AVIF can provide excellent compression and image quality. Browser support is broad, but you should still check your target audience and delivery setup.

Practical tip: Use WebP or AVIF for many website images, but compare the actual results rather than assuming one format is always best.

Resize Images to the Required Dimensions

Uploading a 4000-pixel-wide image to a container that displays it at only 600 pixels wastes bandwidth.

Before uploading an image, determine how large it will appear on your website.

For example:

Blog thumbnail: around 600–800 pixels wide, depending on the design.

Main article image: around 1200 pixels wide, depending on the layout.

Small icon: use an appropriately sized image or vector format such as SVG when suitable.

These are starting points, not universal requirements. Responsive layouts and high-density screens may need different dimensions.

Compress Images Carefully

Compression reduces the amount of data needed to store an image.

There are two main types:

Lossy compression: Reduces file size by removing some image information. It is often effective for photographs, but excessive compression can introduce visible artifacts.

Lossless compression: Reduces file size without losing the original image information.

A good workflow is to create a copy of the original image, compress it, and compare both versions at the size visitors will actually see.

Useful tools include:

Squoosh — compare image formats and compression settings.

TinyPNG — compress supported image formats.

ImageMagick — process images through command-line tools.

Don't aim for the smallest possible file at any cost. Aim for a good balance between file size and visual quality.

Use Responsive Images

A desktop visitor may have a large screen, while a mobile visitor may only need a much smaller image.

HTML's srcset and sizes attributes allow browsers to select a suitable image resource based on the layout and device.

For example:

<img
src="image-800.webp"
srcset="
image-400.webp 400w,
image-800.webp 800w,
image-1200.webp 1200w
"
sizes="(max-width: 600px) 100vw, 800px"
width="800"
height="533"
alt="A person working on a laptop"

In this example, the browser can choose from multiple image sizes rather than always downloading the same large file.

Make sure the image files genuinely exist and that the dimensions and sizes match your website's layout.

Add Lazy Loading Where Appropriate

Lazy loading allows images outside the visible area to load when they are likely to be needed.

For example:

<img
src="gallery-image.webp"
loading="lazy"
width="800"
height="533"
alt="Product displayed on a table"

This can reduce unnecessary initial downloads on pages with many images.

However, avoid lazy-loading the main hero image or another image that is immediately visible when the page opens. Delaying that image can hurt loading performance.

Specify Image Dimensions

Have you ever started reading a page only to see the content move because an image appeared above it?

Providing image dimensions helps the browser reserve space before the image finishes loading.

<img
src="team-photo.webp"
width="1200"
height="800"
alt="Team working together"

The browser can use these dimensions to calculate the image's aspect ratio and reduce unexpected layout shifts.

This is one practical way to help improve Cumulative Layout Shift (CLS), a Core Web Vitals metric.

Optimize Images for SEO and Accessibility

Image optimization isn't only about file size. Images should also be understandable to visitors and search engines.

Follow these practices:

Write descriptive file names, such as website-image-optimization. webp.

Add meaningful alternative text when an image conveys information.

Use empty alt text (alt="") for purely decorative images where appropriate.

Keep images relevant to the surrounding content.

Use captions when additional context would help readers.

Avoid stuffing keywords into file names or alt text.

For more website maintenance advice, explore our guide on How to Find and Fix Broken Links on a Website.

Measure the Results

After optimizing images, test your important pages again.

You can use Google PageSpeed Insights to review performance diagnostics and identify potential image optimization opportunities.

Check whether:

Large images have been resized appropriately.

Modern formats are delivered correctly.

The page downloads fewer unnecessary bytes.

Images remain sharp enough for their intended purpose.

Layout shifts and loading delays have improved.

Remember that image optimization is only one factor affecting page performance. Server response times, JavaScript, CSS, and other resources can also contribute to slow pages.

A Simple Image Optimization Checklist

Before publishing an image, ask yourself:

Is the image the correct size for its display area?

Have I selected an appropriate format?

Is the compression level visually acceptable?

Have I provided suitable dimensions?

Is lazy loading appropriate for this image?

Does the alt text accurately describe its purpose?

Have I tested the page after making changes?

**[Understanding Core Web Vitals: A Beginner-Friendly Guide
(https://www.gonukkad.com/business-representation-website)

Final Thoughts

Optimizing images without sacrificing quality is about making thoughtful choices. Select a suitable format, resize images appropriately, compare compression results, and deliver responsive resources when possible.

Start with the largest images on your most important pages. Measure the results, preserve visual quality, and make improvements based on evidence rather than assumptions.

Understanding Core Web Vitals: A Beginner-Friendly Guide.

Sameer — Tue, 13 Oct 2026 07:45:39 +0000

A website can look beautiful and still provide a frustrating user experience. Pages may load slowly, buttons may respond late, or content may unexpectedly move while a visitor is reading.

This is where Core Web Vitals come in.

Core Web Vitals are Google's metrics for measuring important aspects of a website's user experience, including loading performance, responsiveness, and visual stability. They help developers and website owners identify issues that can make a website difficult to use.

In this guide, we'll explore the three Core Web Vitals, how to measure them, and practical ways to improve them.

What Are Core Web Vitals?

Core Web Vitals are three key performance metrics:

Largest Contentful Paint (LCP): Measures loading performance.

Interaction to Next Paint (INP): Measures responsiveness to user interactions.

Cumulative Layout Shift (CLS): Measures visual stability.

Google's recommended thresholds are:

Metric

Good

What it measures

LCP

2.5 seconds or less

How quickly the main content appears

INP

200 milliseconds or less

How quickly the page responds to interactions

CLS

0.1 or less

How much the page layout shifts unexpectedly

These thresholds should generally be evaluated at the 75th percentile of real user visits, with mobile and desktop experiences considered separately.

Largest Contentful Paint (LCP)

LCP measures how long it takes for the largest visible image or text block in the viewport to render.

For example, imagine opening a business website. The header appears quickly, but the main banner image takes several seconds to load. Visitors may feel the page is slow, even if other elements have already appeared.

How to improve LCP

Optimize large images and use modern formats such as WebP or AVIF where appropriate.

Improve server response times.

Reduce render-blocking CSS and JavaScript.

Preload the main hero image when appropriate.

Use caching and a content delivery network (CDN) where beneficial.

The first step is to identify which resource is delaying the main content rather than making random performance changes.

Interaction to Next Paint (INP)

INP measures how responsive a page feels when users interact with it. Examples include clicking a button, opening a menu, or entering information into a form.

If a visitor clicks “Contact Us” and the page freezes before responding, the site may have an interaction responsiveness problem.

How to improve INP

Reduce unnecessary JavaScript execution.

Break up long-running tasks.

Avoid performing expensive calculations on the main thread during interactions.

Keep event handlers efficient.

Review third-party scripts that may delay the page.

A fast initial page load does not automatically mean the website will respond quickly to user interactions.

Cumulative Layout Shift (CLS)

CLS measures unexpected layout movement during a page's lifetime.

Imagine you're about to click a button, but an advertisement loads above it and pushes the button down. You accidentally click something else. This is a common example of poor visual stability.

How to improve CLS

Specify image and video dimensions.

Reserve space for advertisements and embedded content.

Avoid inserting content above existing content unexpectedly.

Use suitable font-loading strategies to reduce layout changes.

Animate elements using properties that do not trigger unnecessary layout shifts.

The goal is to make the page predictable while users read, scroll, and interact.

How to Measure Core Web Vitals

You don't have to guess whether a website is performing well. Several tools can help you identify problems.

Google PageSpeed Insights

Google PageSpeed Insights provides performance information and recommendations for individual URLs. Where sufficient real-user data is available, it also reports field data.

Google Search Console

Google Search Console includes a Core Web Vitals report for eligible websites. It can help you identify groups of URLs that may need attention.

Chrome DevTools

Chrome DevTools helps developers investigate page performance, JavaScript execution, rendering issues, and layout shifts.

For a broader technical review, you can also explore this guide to technical SEO.

A Practical Website Optimization Workflow

If you're improving a business website, follow a structured process:

Measure: Test important pages using PageSpeed Insights.

Identify: Determine whether LCP, INP, or CLS needs improvement.

Investigate: Find the specific image, script, server response, or layout element causing the problem.

Fix: Make targeted changes instead of applying generic recommendations blindly.

Retest: Check whether the changes improved the results without breaking functionality.

Monitor: Review real-user data over time when available.

Start with important pages, such as the homepage, service pages, product pages, and landing pages.

Do Core Web Vitals Affect SEO?

Core Web Vitals are part of Google's page experience considerations. However, good scores do not guarantee higher rankings.

Search visibility depends on many factors, including relevance, content quality, website accessibility, and competition. A technically fast website still needs useful content that satisfies the searcher's intent.

The best approach is to treat Core Web Vitals as part of a wider strategy that combines technical SEO with helpful content and a good user experience.

Final Thoughts

Core Web Vitals help website owners understand how real users experience their pages. LCP focuses on loading, INP focuses on responsiveness, and CLS focuses on visual stability.

You don't need to fix every performance issue at once. Measure first, prioritize the most important problems, make targeted improvements, and test again.

A website that loads efficiently, responds quickly, and maintains a stable layout creates a better experience for visitors—and gives your broader SEO strategy a stronger technical foundation.

How to Find and Fix Broken Links on a Website.

Sameer — Tue, 13 Oct 2026 07:35:52 +0000

Broken links are a common website issue that can affect user experience, website maintenance, and search engine crawling. They occur when a hyperlink points to a page or resource that is no longer available or cannot be accessed.

For example, a visitor clicks a link to a service page and sees a “404 Page Not Found” error instead. This can be frustrating for users and may prevent them from finding the information they need.

The good news is that broken links can often be identified and fixed with a few practical steps.

In this guide, we'll explore how to find broken links, understand their causes, and fix them using simple tools and techniques.

What Is a Broken Link?

A broken link is a hyperlink that fails to take a user to the intended destination.

Common examples include:

A link pointing to a deleted webpage.

An internal link containing a spelling mistake in its URL.

A link pointing to an external website that no longer exists.

An image or downloadable file that has been removed.

A page returning an unexpected server error.

Broken links may return HTTP status codes such as 404 (Not Found), 410 (Gone), or 5xx (Server Error). However, not every error response means a link is permanently broken. Temporary server problems, access restrictions, and automated request blocking can also affect the result.

Why Should You Fix Broken Links?

Improve User Experience

Visitors expect links to provide useful information. When a link leads to an error page, users may become frustrated or leave the website.

Keeping important links functional makes navigation easier and helps visitors find relevant content.

Help Search Engines Discover Your Content

Search engines use links to discover URLs and understand relationships between pages. Broken internal links can interrupt those pathways and make important pages harder to discover.

Fixing them helps maintain a clear and accessible website structure. However, a single broken link does not automatically cause a ranking penalty.

Maintain Useful Internal Linking

Internal links connect related articles, product pages, and service pages. If these links stop working, visitors may miss relevant information.

Regular checks help ensure that your internal linking structure continues to support website navigation.

Protect Important Referral Traffic

External links can bring visitors from other websites. If a high-value external link points to an unavailable resource, users may lose access to useful information.

Reviewing these links helps maintain the quality of your website's content.

How to Find Broken Links on a Website

There are several ways to identify broken links, depending on your website's size and technical setup.

Method 1: Use Google Search Console

Google Search Console is a useful starting point for identifying indexing and crawling issues.

Steps:

Open Google Search Console and select your website property.

Navigate to the Page indexing report.

Review URLs reported as not indexed and examine the reasons provided.

Investigate relevant 404 errors and determine whether the affected URLs are still linked from your website.

Fix broken internal links or redirect outdated URLs when appropriate.

Keep in mind that the Page indexing report is not a complete broken-link checker. It reports Google's indexing observations, which can include URLs that were intentionally removed or should not be indexed.

Method 2: Use a Website Crawling Tool

Website crawlers can scan pages and identify links that return error responses.

Popular options include Screaming Frog SEO Spider and other website auditing tools.

General workflow:

Enter your website's starting URL.

Run a crawl within the tool's permitted limits.

Filter the results for client errors, particularly 4xx responses.

Review the pages containing links to those URLs.

Export the results and prioritize important issues.

For a large website, crawling tools can save significant time compared with manually checking every link.

Method 3: Check Links Manually

Manual checks are useful for smaller websites or important pages.

Open the page, click the link, and verify that the destination loads correctly. If a link fails, check the URL for typing mistakes and confirm whether the destination has moved.

Avoid relying on one failed attempt alone. Some websites block automated requests or experience temporary outages.

Method 4: Check Broken Links With Python

If you want to automate basic link checking, Python can help you inspect a list of URLs.

The following example checks URLs from a text file named urls.txt. Put one URL per line.

import requests

with open("urls.txt", "r", encoding="utf-8") as file:
urls = [line.strip() for line in file if line.strip()]

for url in urls:
try:
response = requests.get(
url,
timeout=10,
allow_redirects=True
)

    print(
        f"{response.status_code} | "
        f"{url} | Final URL: {response.url}"
    )

except requests.RequestException as error:
    print(f"REQUEST FAILED | {url} | {error}")

Before running the script, install the required library:

pip install requests

This script checks a supplied list of URLs; it does not automatically crawl every page on a website. It also makes ordinary GET requests, so use it responsibly and avoid sending excessive requests to websites you do not control.

A failed request does not always mean the destination is permanently unavailable. Review the result before deciding what action to take.

How to Fix Broken Links

Once you identify a broken link, the correct fix depends on what happened to the destination.

Fix 1: Correct the URL

If the link contains a spelling mistake or incorrect path, update it to the correct destination.

For example:

Incorrect:
https://example.com/servicees

Correct:
https://example.com/services

Always verify that the corrected destination loads successfully.

Fix 2: Add a Relevant Redirect

If a webpage has moved permanently, a server-side 301 redirect may be appropriate.

For example:

/old-seo-guide → /seo-guide

Redirects should lead to the closest relevant replacement. Avoid redirecting unrelated deleted pages to the homepage simply to eliminate 404 responses.

Fix 3: Restore the Missing Page

If an important page was deleted accidentally, restoring the original page may be the best solution.

This is especially useful when the page contains valuable information or has backlinks pointing to it.

Fix 4: Remove Unnecessary Links

Sometimes a page or resource has been intentionally removed and has no suitable replacement.

In that case, remove the outdated link or replace it with a useful alternative. A genuine 404 or 410 response may be appropriate when the content is permanently gone.

Fix 5: Update External Links

If an external website has moved its content, look for the publisher's updated URL or another reliable resource covering the same subject.

If no suitable alternative exists, remove the link rather than directing readers to an unrelated page.

How Often Should You Check for Broken Links?

The ideal frequency depends on the size and update schedule of your website.

Small websites: Check important links monthly or after significant updates.

Business websites: Include link checks in regular website maintenance.

Large websites: Use scheduled crawls and monitor important technical issues continuously where practical.

After fixing a broken link, revisit the affected page and confirm that the link now works as expected.

Final Thoughts

Broken links are a normal part of website maintenance, especially when content changes or pages are removed. The important thing is to identify them early and choose the right solution for each situation.

Start by checking your most important pages, use tools to identify problematic URLs, and correct, redirect, restore, or remove links according to the circumstances.

A well-maintained website is not just easier for search engines to crawl. It also helps visitors find the information they came for without unnecessary frustration.