Do-Follow vs No-Follow Links: What’s the Difference?

A dofollow link passes SEO authority from the linking page to your site, telling search engines “we vouch for this.” A nofollow link carries a rel=”nofollow” tag that tells search engines not to pass that authority, even though a human visitor can still click through normally. Both are real, clickable links. The difference is entirely about whether search engines count it as a vote of confidence.

How the Nofollow Tag Actually Works

By default, every link on the web is dofollow unless someone deliberately adds rel=”nofollow” (or the newer rel=”sponsored” and rel=”ugc” variants Google introduced in 2019) to the HTML. Google introduced nofollow back in 2005 specifically to fight comment spam, letting site owners accept user comments and forum posts without handing out free authority to every spammer who dropped a link.

Since 2019, Google treats nofollow as a “hint” rather than an absolute instruction, meaning it can still choose to consider nofollow links for crawling and, in some cases, ranking signals, though it generally still won’t pass the same authority weight a normal dofollow link carries.

Where You’ll Typically Find Each Type

Nofollow shows up by default on blog comments, forum signatures, most social media profile links, Wikipedia’s external references, paid or sponsored content (Google requires this by policy), and press release distribution sites. Dofollow is the default everywhere else: genuine editorial mentions, guest posts on quality sites, resource page listings, and most natural citations from other websites.

Why Nofollow Links Still Matter

A backlink profile built entirely of dofollow links actually looks unnatural to Google. Real, organically-earned link profiles almost always include a healthy mix of both, since real websites link out using rel=”nofollow” constantly without thinking about it. A handful of nofollow links from high-traffic sites like Reddit or major news comment sections also drive real referral traffic and brand visibility, even without passing direct ranking authority.

A Common Mistake in Link Building

Some vendors sell “100% dofollow” link packages as a premium feature. Be cautious here. An unnaturally dofollow-heavy profile, especially one built quickly, is exactly the pattern Google’s spam systems are trained to flag. A healthy link building campaign should include a realistic mix, generally weighted toward dofollow since that’s what earns real ranking value, but not exclusively so.

Nofollow Links and Guest Posting

Some guest post sites nofollow all outbound links in author bios by default, regardless of how relevant or well-written the content is. This doesn’t make the placement worthless, the traffic, brand exposure, and topical relevance still have value, but it does mean the link won’t pass the same ranking authority a dofollow placement would. When evaluating guest post opportunities, always confirm the follow status upfront rather than assuming, since pricing should reflect which type you’re actually getting.

Rel=”sponsored” and Rel=”ugc”: The Newer Tags

Google introduced two additional link attributes alongside nofollow in 2019: rel=”sponsored” for paid links and affiliate content, and rel=”ugc” for user-generated content like comments and forum posts. These give Google more granular information about why a link exists, though functionally they behave similarly to nofollow in terms of not passing full ranking authority. If you’re running sponsored content or paid placements, using rel=”sponsored” correctly (rather than leaving links fully dofollow) keeps you compliant with Google’s guidelines and avoids the site being flagged for undisclosed paid links.

How to Check Whether a Link Is Dofollow or Nofollow

Right-click the link and view the page source, then search for “nofollow” near that link’s HTML. Browser extensions like “NoFollow” (Chrome) also color-code links on any page automatically, making it easy to audit an entire page’s link profile at a glance without digging through source code manually.

What This Means for Your Own Website’s Outbound Links

The dofollow/nofollow decision isn’t just about links pointing at you, it also applies to links you place on your own site pointing out to others. Nofollowing links to untrusted or unverified external sites (in comments, forum posts, or user-submitted content on your own pages) protects your site from passing authority to spam, while genuine editorial links to sources you trust are generally fine left as dofollow.

How This Affects Your Own Content Strategy

When you publish content and naturally cite other sources, defaulting every outbound link to nofollow isn’t necessary or expected. Genuine editorial links to sources you trust can stay dofollow. Reserve nofollow specifically for user-submitted content, paid placements, or links to sources you can’t vouch for, which is exactly the distinction Google’s guidelines are built around.

How Nofollow Attribution Interacts With E-Commerce and Affiliate Links

Affiliate links carry their own attribution requirements now, generally rel=”sponsored”, separate from ordinary editorial nofollow. Businesses running affiliate programs or sponsored content need to apply the correct attribute specifically, not just default everything to a generic nofollow, since Google’s guidelines distinguish between these link types even though they behave similarly in terms of authority passed.

A Quick Historical Note on Why Nofollow Exists

Google introduced the nofollow attribute in 2005 specifically to fight comment spam, letting site owners add links in user-generated content, blog comments, forum posts, without passing authority to whoever posted them. The system has expanded significantly since then, but that original problem, spam links flooding open platforms, is still the core reason the tag exists.

What Happens If You Never Use Nofollow On Your Own Site

If your site allows any form of user-generated content, comments, forum posts, guest submissions, without nofollow tags, you’re effectively vouching for every link anyone posts there. That’s both a spam risk and, in aggregate, can quietly signal to Google that your site doesn’t moderate outbound links carefully.

One More Practical Note

Check your own outbound links periodically, since a redesign can sometimes accidentally strip nofollow tags you intended to keep.

Frequently Asked Questions

Should I only build dofollow links?

No. A natural mix of both is healthier and safer than an all-dofollow profile, which can look manipulated to Google’s spam detection systems.

Do nofollow links help SEO at all?

Indirectly, yes. They drive referral traffic, brand visibility, and Google has confirmed it may still use them as a “hint” signal in some cases, even without passing full ranking authority.

Are social media links dofollow or nofollow?

Almost always nofollow by default on platforms like Twitter/X, Facebook, Instagram, and LinkedIn, though they still provide real traffic and visibility value.

Can a nofollow link ever pass ranking authority?

Google has said it may treat nofollow as a hint and factor it in for crawling and indexing purposes in some cases, though it generally still won’t pass the same authority weight as a dofollow link.

Our link building services focus on earning a genuinely natural mix of dofollow and nofollow links from relevant, real websites, not artificially inflating one type to look good on a report. See our Domain Rating glossary entry for how dofollow links specifically affect that metric.