Google's Core Web Vitals directly affect how your pages feel to users, and they are part of the page experience signals used in search. Here is a practical checklist we use when auditing sites.
The three metrics and their "good" thresholds
- LCP (Largest Contentful Paint): 2.5 seconds or less
- INP (Interaction to Next Paint): 200 milliseconds or less
- CLS (Cumulative Layout Shift): 0.1 or less
Measure them on real devices with PageSpeed Insights, the Chrome UX Report, and Lighthouse. Field data matters more than lab scores.
1. Fixing LCP
- Serve the hero image in WebP or AVIF and set explicit
widthandheight. - Preload the LCP image and critical fonts:
<link rel="preload" as="image" href="/hero.webp" fetchpriority="high">
- Inline critical CSS and defer the rest.
- Use a CDN and server-side caching to reduce time to first byte.
2. Fixing INP
- Break up long JavaScript tasks (anything over 50ms) with
setTimeoutorscheduler.yield(). - Remove unused third-party scripts. Chat widgets and tag managers are common offenders.
- Debounce expensive input handlers and avoid heavy work on the main thread.
3. Fixing CLS
- Always reserve space for images, ads and embeds.
- Use
font-display: swapwith a well-matched fallback font. - Never inject content above existing content after load.
A quick workflow
- Run PageSpeed Insights on your top 5 landing pages.
- Fix the worst metric first, usually LCP.
- Re-test after each change and track field data for 28 days.
Final thoughts
Performance is not a one-time task. Small, measured improvements compound into better rankings, lower bounce rates and higher conversions.
If you want a team to handle performance, custom web apps or technical SEO for you, take a look at DiginixIT, a web engineering and digital growth agency in Pakistan.
Top comments (1)