published: false
description: Understand how regular, nofollow, sponsored, and UGC links work and when each link type should be used.

tags: seo, webdev, html, beginners

Dofollow, Nofollow, Sponsored, and UGC Links Explained for Developers

Links are one of the fundamental building blocks of the web. They help users navigate between pages, allow search engines to discover content, and provide context about how different resources are connected.

However, not every link communicates the same relationship.

Developers and website owners should understand the difference between regular links, nofollow, sponsored, and ugc. Using the correct link attribute improves transparency and helps search engines interpret the purpose of a link more accurately.

This guide explains each link type, when to use it, and the common mistakes to avoid.

What Is a Regular Link?

A standard HTML link looks like this:

<a href="https://example.com/technical-guide">
  Read the technical guide
</a>

This link does not contain a rel attribute. Search engines can generally crawl it and may use it to understand the relationship between the linking page and the destination.

SEO tools often call this a “dofollow” link.

However, dofollow is not an official HTML attribute. You do not need to write rel="dofollow" to create a regular link.

The following code is unnecessary:

<a href="https://example.com" rel="dofollow">
  Example
</a>

A normal crawlable link only needs a valid destination inside the href attribute.

Use a regular link when you are voluntarily referencing a page and do not need to identify it as advertising, sponsored placement, or untrusted user-generated content.

What Is a Nofollow Link?

A nofollow link contains rel="nofollow":

<a href="https://example.com" rel="nofollow">
  Visit the website
</a>

The attribute tells search engines that the website does not want to associate itself with the destination in the normal way.

Common situations for using nofollow include:

• Linking to a page you cannot fully verify
• Referencing an untrusted source for discussion
• Adding a link when the other available attributes do not describe the relationship
• Managing certain user-submitted links
• Following a platform’s editorial or moderation policy

A nofollow link can still be useful.

Readers can click it, referral traffic can reach the destination, and search engines may still discover the URL through other sources. The attribute does not make the link invisible to users.

What Is a Sponsored Link?

A sponsored link contains rel="sponsored":

<a href="https://example.com/product" rel="sponsored">
  View the product
</a>

Use this attribute when the link exists because of an advertising, sponsorship, affiliate, or other commercial arrangement.

Examples include:

• Paid product placements
• Sponsored articles
• Affiliate links
• Advertising links
• Links added in exchange for money, products, or services

The purpose is transparency. It allows the relationship behind the link to be communicated through the page’s HTML.

A sponsored link can still send valuable visitors to a business. The attribute simply identifies why the link was placed.

Do not try to hide a commercial arrangement by formatting a paid link as an independent editorial recommendation.

What Is a UGC Link?

UGC stands for user-generated content.

A UGC link uses rel="ugc":

<a href="https://example.com/profile" rel="ugc">
  User profile
</a>

This attribute is appropriate for links created by users rather than the website’s editorial team.

Common examples include:

• Forum posts
• Blog comments
• Community profiles
• Public guestbooks
• User reviews
• Community questions and answers

Allowing users to publish links creates a spam risk. Automated accounts may attempt to place large numbers of promotional links across the platform.

Applying ugc helps identify those links as user-generated. It should be combined with moderation, rate limits, spam detection, and sensible account restrictions.

The attribute alone is not a complete anti-spam system.

Can Multiple Rel Values Be Used Together?

Yes. A link can contain more than one rel value.

For example, a sponsored link published inside user-generated content could use:

<a href="https://example.com" rel="ugc sponsored">
  Sponsored community link
</a>

A platform may also use:

<a href="https://example.com" rel="nofollow ugc">
  Community link
</a>

Separate each value with a space.

Developers should choose values based on the actual relationship between the website, contributor, and destination.

Does Nofollow Mean Search Engines Cannot Crawl the URL?

Not necessarily.

The attribute describes how the linking website wants search engines to treat that particular link. It does not prevent the destination from being discovered elsewhere.

The same URL may appear in:

• XML sitemaps
• Internal navigation
• Regular links from other websites
• Social media posts
• Browser discovery systems
• Previously indexed pages

If you need to control whether a page appears in search results, changing external links to nofollow is not the correct solution.

Indexing controls and link attributes serve different purposes.

Which Attribute Should You Use?

The correct choice depends on why the link exists.

Use a regular link when:

• Your editorial team chose the destination voluntarily.
• The destination provides useful supporting information.
• No payment or exchange influenced the link.
• You trust the source sufficiently to reference it.

Use rel="nofollow" when:

• You do not want to associate the page with the destination.
• The other relationship values do not apply.
• Your website policy requires it for certain external links.

Use rel="sponsored" when:

• The link is paid.
• It is part of an advertisement.
• It comes from an affiliate relationship.
• A product or service was exchanged for the placement.

Use rel="ugc" when:

• A user created the link.
• It appears in a forum, comment, review, or community post.
• The platform did not add it as an editorial recommendation.

Selecting the correct attribute should be based on transparency, not on an attempt to manipulate rankings.

Link Attributes and Backlink Campaigns

A backlink campaign should focus on relevance, content quality, and real visitors rather than collecting only one technical type of link.

A natural link profile may include:

• Editorial references
• Community mentions
• Business profiles
• Nofollow links
• UGC links
• Brand citations
• Links using different anchor text
• Links to different useful pages

For Thai website owners who need assistance developing a balanced campaign, this บริการสร้าง Backlink สำหรับเว็บไซต์ is an additional resource for planning relevant link opportunities.

Even when a link does not pass the ranking value someone expects, it may still introduce the website to potential readers, customers, collaborators, or developers.

Common Link Attribute Mistakes

Adding rel="dofollow"

There is normally no need to add this value. A standard link without a qualifying rel value is already treated as a regular link.

Marking every external link as nofollow

External links are a normal part of the web. Automatically applying nofollow to every external reference may prevent your HTML from expressing meaningful editorial relationships.

Choose attributes according to the purpose of each link.

Using sponsored links without disclosure

If compensation influenced a link, identify the commercial relationship appropriately. Readers should not be misled into believing that paid placement is an independent recommendation.

Allowing unmoderated user links

The ugc attribute can describe a link, but it cannot prevent malicious submissions.

Community websites still need:

• Spam filters
• Account verification
• Moderation tools
• Posting limits
• Reporting systems
• Automated abuse detection

Using link attributes as indexing controls

Link attributes are not replacements for proper indexing directives. If you control the destination website, use the appropriate page-level or server-level controls for your objective.

Focusing only on SEO tools

SEO tools may classify links differently. Their labels and scores are third-party measurements rather than instructions that search engines are required to follow.

Inspect the actual HTML when you need to confirm which attribute a page uses.

How to Inspect a Link in Your Browser

Most modern browsers allow you to inspect a link:

1. Open the page containing the link.
2. Right-click the link.
3. Select “Inspect.”
4. Locate the <a> element.
5. Check its href and rel attributes.

You may see code such as:

<a
  href="https://example.com"
  rel="nofollow ugc"
>
  Example website
</a>

This tells you that the link is user-generated and includes a nofollow qualification.

Remember that inspecting HTML does not guarantee a specific ranking outcome. It only shows how the link is marked on that page.

Link Review Checklist for Developers

Before releasing a page or platform feature, verify that:

• Every link has a valid href.
• Anchor text describes the destination clearly.
• Paid links use sponsored.
• User-generated links use ugc where appropriate.
• Untrusted links are handled according to website policy.
• External links do not expose users to unsafe destinations.
• Links remain usable with a keyboard.
• New-tab behavior is implemented securely.
• Automated user submissions are moderated.
• The page does not contain hidden or misleading links.

This review improves accessibility, security, transparency, and overall website quality.

Final Thoughts

Regular, nofollow, sponsored, and UGC links are not simply labels for “good” or “bad” backlinks. They describe different relationships between a website and the pages it references.

Use regular links for genuine editorial references, sponsored for commercial placements, ugc for user-created links, and nofollow when the other values do not apply and you do not want a normal association with the destination.

The best implementation is the one that accurately represents why the link exists.