Backlink Types

A backlink is just a link from one site to another. But not all links are the same. The type tells you how the link was acquired, whether it can pass ranking authority, and how risky it is to have in your profile.

Start with the attribute. Every link carries a rel value: dofollow (the default, no rel needed), nofollow, sponsored, or ugc. Dofollow links can pass PageRank – that is the juice you want for rankings. Nofollow links tell Google to ignore the link for ranking purposes, but they can still send traffic and look natural. Sponsored and UGC are Google’s labels for paid links and user-generated content like comments. If you forget to mark a paid link with sponsored, you risk a penalty under Google’s link spam policies.

Now the acquisition method. This is where most practitioners get tripped up. The strongest type is an editorial link – someone linked to your content because they found it useful, no payment or ask required. That is rare. More common are guest post links, digital PR placements, HARO links, link insertions (adding your link to an existing article), reciprocal links (you link to me, I link to you), UGC links (forum signatures, comment sections), directory links, and PBN links (private blog networks). Each comes with a different risk profile. PBNs and paid links are the most dangerous because they explicitly violate Google’s guidelines. Directory links are usually low-value but harmless if the directory is legitimate. Reciprocal links used to be fine; now Google sees them as manipulative if done at scale.

I group links by risk and effort. Editorial and digital PR are high effort, low risk. Guest posts and link insertions are medium effort, medium risk if done well. PBNs, paid links, and reciprocal exchanges are low effort, high risk. That is the trade-off.

Backlink type matters most during three activities: auditing your [backlink profile](/backlink-profile/), planning your [link building strategy](/backlink-strategy/), and deciding whether to disavow links.

During an audit, I classify every new link by type. If I see a sudden spike in directory links, that is a red flag – could be a negative SEO attack or a spammy SEO agency cutting corners. I also check the ratio of dofollow to nofollow. A profile with 95% dofollow looks unnatural because real editorial links include plenty of nofollows. I aim for a 60-70% dofollow ratio. That is a rough benchmark, not a rule, but it has saved me from manual action twice.

When building links, type determines which tactics I invest in. I spend most of my budget on [digital PR](/digital-pr/) and [editorial links](/editorial-links/) because they solve the biggest problem: they are hard to undo. A guest post on a spammy site can disappear overnight; a mention in a BBC article stays. I also use [guest posting](/guest-posting/) for niche sites, but I vet the host’s own link profile first. If the site has sold links to everyone, I pass.

For disavow, type is critical. I only disavow links that are clearly manipulative – paid links on irrelevant sites, PBN links, or link exchanges. I never disavow nofollow links or UGC links because they do not harm rankings and they can still drive referral traffic. Many people make the mistake of disavowing every low-quality directory link. That can backfire if the directory is actually a legitimate business listing site that Google expects to see in a local SEO profile.

Finally, type matters when diagnosing ranking drops. If a competitor surpasses you, check their link profile. If they have a high number of editorial links from authoritative sites, you need to match that quality, not outrun them on quantity.

For years I thought more dofollow links was always better. I used to turn down perfectly good nofollow mentions from high-traffic sites because I believed they were worthless for SEO. That was a mistake. Nofollow links still drive traffic, build brand visibility, and look natural in your profile. Google has even said that nofollow links are considered as hints for ranking, so they might count in some cases.

I also misjudged reciprocal links. I used to exchange links freely with anyone who asked, thinking it was a fair trade. After a manual action in 2018, I learned that Google treats excessive reciprocal links as a link scheme. Now I limit reciprocal exchanges to genuine partner relationships and I nofollow my outbound links in those cases.

Another thing I got wrong was ignoring UGC links. I used to delete spammy blog comments linking to my site. But those links are already marked as UGC by Google, and they are harmless. If the comment is actually relevant, I keep it. One time a forum post with a UGC link to my site was the second-highest traffic referrer for a month. I would have lost that traffic if I had disavowed it.

Finally, I used to believe that all directory links were bad. I disavowed every directory link I found. That was a mistake for local SEO. A legitimate business listing on Yell or Yelp is a directory link. Those are expected and help with local search visibility. Now I only disavow directories that clearly exist solely to sell links – usually the ones with a 50-cent fee and no editorial curation.