What Are Link Attributes and How Do They Impact SEO Value?
For comprehensive link building strategies and optimization tactics, see our [complete Link Building Strategies guide](/resources/link-building-strategies). Link attributes like nofollow, sponsored, and UGC tell search engines how to treat specific hyperlinks. Understanding these attributes helps you evaluate link opportunities, build appropriate link profiles, and implement proper linking practices on your own website.
According to a Moz study, approximately 60% of links across the web are nofollowed, making understanding these attributes essential for realistic link building expectations. Google's 2019 update changed nofollow from a directive to a hint, fundamentally altering how these links may influence rankings and making the topic more nuanced than simple "counted vs. not counted" distinctions. This evolution reflects broader shifts toward entity-based authority signals, where brand mentions, co-citation patterns, and contextual relevance supplement traditional link equity calculations.
What Is the Nofollow Link Attribute?
Nofollow has evolved significantly since its introduction.
Original Purpose and Creation
Google introduced nofollow in 2005 to address link spam:
- Comment spam was flooding blogs with links
- Paid links were distorting ranking signals
- Site owners needed a way to link without endorsement
- The attribute indicated "I can't vouch for this link"
Technical Implementation
Nofollow appears in HTML as:
```html
```
Can also be applied page-wide via meta robots:
```html
<meta name="robots" content="nofollow">
```
Historical Treatment (2005-2019)
Originally, nofollow meant:
- Google didn't follow the link for crawling
- No PageRank passed to linked pages
- Link didn't count toward rankings
- Essentially invisible for SEO purposes
Current Treatment (2019-Present)
Google announced significant changes in September 2019:
- Nofollow now treated as a "hint" rather than directive
- Google may choose to follow nofollow links for crawling
- May use nofollow links for ranking purposes in some cases
- The change acknowledged nofollow links provide valuable signals
This shift means nofollow links potentially carry more SEO value than previously assumed.
What Are the Sponsored and UGC Link Attributes?
Google introduced additional attributes alongside the 2019 nofollow changes.
Sponsored Attribute
Specifically for paid and commercial links:
```html
```
Use sponsored for:
- Paid advertisements and placements
- Sponsored content and advertorials
- Affiliate links with compensation
- Any link acquired through payment
UGC (User-Generated Content) Attribute
For links within user-submitted content:
```html
```
Use UGC for:
- Comment section links
- Forum post links
- User profile links
- Community-submitted content
Combining Attributes
Attributes can be used together:
```html
```
Google treats these combinations appropriately, understanding multiple attributes may apply.
When Should You Apply Nofollow Attributes?
Proper implementation protects your site and follows guidelines.
Untrusted Content
Links you can't verify or endorse:
- User-submitted links in comments or forums
- Links from unknown or unvetted sources
- Content from unverified contributors
- Links in areas susceptible to spam
Paid Relationships
Commercial link arrangements require disclosure:
- Display advertising links
- Sponsored content links
- Affiliate program links
- Any link involving compensation
Using sponsored or nofollow for paid links is required - failure to do so violates Google's guidelines.
Crawl Control
Managing how search engines crawl your site:
- Login and registration pages
- Internal search results
- Low-priority utility pages
- Pages you don't want indexed
How Does Nofollow Affect Link Value?
Understanding value differences informs strategy.
Followed Link Benefits
Links without restrictive attributes:
- Pass PageRank and link equity
- Contribute to target page rankings
- Represent endorsement signals
- Provide full SEO value (as links go)
Nofollow Link Benefits
Even nofollowed links provide value:
- Drive referral traffic (visitors click regardless of SEO)
- Increase brand visibility and awareness
- May influence rankings (Google's hint treatment)
- Contribute to natural link profile diversity
- Build relationships for future followed opportunities
A high-traffic nofollow link from a major publication often provides more business value than a followed link from an obscure blog.
Natural Profile Considerations
Healthy link profiles include nofollow links:
- Organic link acquisition naturally includes nofollows
- Over-concentration on followed links appears manipulative
- Wikipedia links (nofollow) are still valuable citations
- Social media links (nofollow) drive traffic and visibility
How Should Nofollow Links Fit Into Link Building Strategy?
Balance nofollow considerations with broader strategy.
Prioritization Framework
When evaluating opportunities:
- Followed links preferred when quality is equal
- High-value nofollows from authoritative sites still worthwhile
- Traffic and visibility value may exceed SEO-only considerations
- Relationship value may lead to future followed opportunities
Opportunity Assessment
Evaluate nofollow opportunities holistically:
- Will this drive meaningful referral traffic?
- Does the source reach your target audience?
- What brand visibility does this placement provide?
- Could this relationship lead to other opportunities?
Don't dismiss valuable placements solely because links are nofollowed.
Profile Building
Natural profiles include both types:
- Mix of followed and nofollowed links
- Variety reflects organic acquisition
- Over-optimization on followed appears suspicious
- Accept natural distribution
How Should You Implement Link Attributes on Your Site?
Proper implementation protects your site and users.
User-Generated Content
Handle user links appropriately:
- Apply UGC or nofollow to comment links
- Moderate for quality and relevance
- Protect against spam manipulation
- Maintain editorial standards
Many CMS platforms apply nofollow to comment links by default.
Paid and Sponsored Content
Disclosure requirements:
- Use sponsored attribute for paid placements
- Clearly mark sponsored content
- Comply with FTC and platform guidelines
- Avoid penalties for undisclosed links
Editorial Links
Your genuine endorsements:
- Followed links indicate you vouch for the content
- Nofollow sources you can't verify
- Consider link destination quality
- Maintain editorial integrity
How Do You Check Link Attributes?
Verify attributes on links to your site and from your site.
Inspection Methods
Check link attributes:
- Browser developer tools (right-click, Inspect)
- View page source and search for URLs
- SEO browser extensions (Ahrefs, Moz, etc.)
- Link analysis tools in backlink checkers
Backlink Monitoring
Track your inbound link attributes:
- Ahrefs, SEMrush, Moz report followed vs. nofollow
- Monitor attribute distribution over time
- Identify patterns in acquisition
- Note sources that nofollow vs. follow
Site Auditing
Review your own linking practices:
- Audit internal and external linking
- Verify paid links properly attributed
- Check user content handling
- Ensure consistent implementation
What Are Common Misconceptions About Nofollow Links?
Correct frequent misunderstandings.
"Nofollow Links Have Zero Value"
Not accurate:
- Traffic value remains completely unaffected
*Continue reading the full article on this page.*
Key Takeaways
- This guides article shares hands-on strategies for SEO pros, marketing directors, and business owners. Use them to improve organic search and AI visibility across Google, ChatGPT, Perplexity, and other platforms.
- The methods here follow Google E-E-A-T guidelines, Core Web Vitals standards, and GEO best practices for 2026 and beyond.
- Companies that pair technical SEO with strong content, authority link building, and structured data see lasting organic growth. This growth becomes measurable revenue over time.
About the Author: Jason Langella is Founder & Chairman at SEO Agency USA, delivering enterprise SEO and AI visibility strategies for market-leading organizations.