Nofollow and Sponsored Links

Nofollow and sponsored links are hyperlinks carrying a rel attribute, rel="nofollow" or rel="sponsored", that tells search engines not to treat the link as an editorial endorsement. Google introduced nofollow in 2005 and added the more specific sponsored and ugc values in 2019.

Affiliate links are paid relationships, and search engines expect paid links to be marked. For publishers, correct attributes keep a site inside search guidelines. For SaaS vendors, they set the right expectation: an affiliate program buys traffic and conversions, not ranking power.

How it works in B2B SaaS

When a review site, newsletter, or comparison blog links to a SaaS product through an affiliate link, the recommended markup is rel="sponsored" on the anchor tag. rel="nofollow" remains acceptable for the same purpose, and the values can be combined.

Since 2019 Google treats these attributes as hints rather than strict directives, meaning it decides whether to ignore the link for ranking purposes. In practice, marked links should be assumed to pass no ranking credit.

Unpaid mentions are the contrast. When a customer writes a tutorial and links to the vendor plainly, that followed link can pass authority. This is why organic coverage and affiliate coverage play different roles in a SaaS growth strategy, even when they look identical to readers.

A worked example

TaskFlow, a project management SaaS, runs an affiliate program with 50 content affiliates. Over a year those affiliates publish about 150 posts, each linking with tracking parameters and rel="sponsored". The links drive 30,000 visits and 400 trial signups, but none of the ranking credit that 150 editorial links would carry.

In the same year, 10 bloggers and customers mention TaskFlow with normal followed links because they genuinely use the product. Those 10 links do more for TaskFlow's own search rankings than the 150 sponsored ones combined.

Neither set is wasted. The affiliate links are measured in conversions and paid in commissions. The organic links are measured in authority. Problems only start when someone expects one set to do the other's job.

Which attribute to use when

• Use rel="sponsored" for any link that exists because of compensation: affiliate links, paid placements, and sponsored posts.
• Use rel="ugc" for links inside user-generated content such as comments and forum posts.
• Use rel="nofollow" as the general option for any link you do not want to vouch for.

Values can be combined, such as rel="sponsored nofollow", and Google has said existing nofollow markup on paid links does not need to be changed retroactively. The attribute belongs on the visible anchor: cloaked or redirected affiliate links still need it, because search engines follow redirects.

Nofollow and sponsored links vs affiliate disclosure

This is the confusion that actually costs people. Rel attributes speak to crawlers; disclosure speaks to humans and regulators. Adding rel="sponsored" does nothing to satisfy consumer protection rules such as the FTC's endorsement guidelines in the United States, which expect a clear, human-visible statement that a link is compensated.

A compliant affiliate page typically needs both: the attribute in the HTML for search engines, and a plain-language disclosure near the links for readers. One never substitutes for the other; treat this as general background rather than legal advice.

How it shows up in affiliate and partner programs

Well-run programs put link markup requirements directly in their affiliate agreements, asking partners to use rel="sponsored" and to disclose the relationship visibly. This protects the vendor's backlink profile from looking like a paid link scheme.

Vendors auditing their backlinks should expect affiliate links to show up as sponsored or nofollow, and should not worry about it. The metric for those links is revenue per partner, tracked through the affiliate platform, not domain authority.

Common mistakes

• Publishers leaving affiliate links followed, which risks manual action from search engines against link schemes.
• Vendors quietly encouraging followed affiliate links for SEO value, which puts every participating partner at that same risk.
• Blanket-nofollowing every outbound link, which withholds your endorsement even from sources you genuinely recommend.
• Assuming a link shortener or redirect hides the affiliate relationship from crawlers. It does not.

Frequently asked questions

Do sponsored links help SEO at all?

Plan on no ranking benefit. Because the attributes are hints, search engines could in theory count some marked links, but no strategy should depend on it. The reliable value of affiliate links is qualified traffic and conversions, not authority.

Should affiliates use nofollow or sponsored on affiliate links?

rel="sponsored" is the specific, preferred value for compensated links. rel="nofollow" is still acceptable, and combining both is fine. Whichever attribute you use, a visible disclosure for readers remains a separate requirement.

Does marking a link nofollow satisfy disclosure requirements?

No. Regulators care about what a human reader can see, not HTML attributes. Keep a clear written disclosure near the affiliate links themselves, and check the rules that apply in your market, since this is not legal advice.