Affiliate Links and SEO: What Google Actually Says

Most arguments about affiliate SEO are based on guesswork. Google has actually documented a fair amount: how to mark affiliate links, what a thin affiliate page is, what it expects from product reviews, and which spam policies catch feed-driven sites. This article sticks to that documentation and turns it into things you can check on your own pages.

Marking affiliate links: sponsored, nofollow, ugc

Google's page on qualifying outbound links defines three rel values:

Three points from Google's documentation settle most debates:

• Sites in affiliate programmes should qualify affiliate links with rel="sponsored", whether the links were created manually or dynamically. That includes links inside widgets, product boxes and tables generated from feeds.
• For avoiding link-scheme problems, Google prefers sponsored, but says sponsored and nofollow are treated the same.
• You can combine values. rel="nofollow sponsored" is valid and keeps older systems that only understand nofollow happy.

Google also warns that failing to qualify these links can lead to manual or algorithmic actions that hurt search visibility. There is no upside to leaving them unmarked.

<span class="ad-label">Reklamelink</span>
<a href="https://tracking.example/click?..." rel="sponsored noopener" target="_blank">
  See the price at Example Shop
</a>

The visible label in that example is for your readers and for Danish marketing law, not for Google. rel attributes are invisible to people. The disclosure guide explains the wording.

Thin affiliation: Google's definition

Google's spam policies define thin affiliation as publishing content with product affiliate links where the product descriptions and reviews are copied directly from the original merchant without any original content or added value. Pages can also be thin when they are part of a programme that distributes the same content across many affiliates.

The same policy says, explicitly, that not every site in an affiliate programme is a thin affiliate. Google's examples of affiliate pages that add value:

• additional information about price,
• original product reviews,
• rigorous testing and ratings,
• navigation of products or categories,
• product comparisons.

Read that list as a design brief. A page that does at least one of those things well, and says so clearly, has a reason to exist. A page that repeats the shop's description does not.

Scaled content abuse and feed-built pages

Since March 2024 Google has a scaled content abuse policy. It covers generating many pages primarily to manipulate rankings rather than help users, whether by AI, by people or by a mix. Two of its named examples describe common affiliate shortcuts directly:

• using generative AI tools to generate many pages without adding value for users,
• scraping feeds, search results or other content to generate many pages, including through automated transformations like synonymising or translating, where little value is provided to users.

A product feed is not the problem; a page per feed row is. Use feeds to keep facts current on pages that have their own reason to exist. Our product feeds guide goes into how.

What the reviews system looks for

Google's reviews system evaluates content that gives a recommendation, an opinion or analysis, and aims to reward reviews with insightful analysis and original research written by experts or enthusiasts. It mainly works page by page, but on sites with a lot of review content, the whole site can be evaluated. Google no longer announces individual reviews updates; improvements happen continuously.

Google's guidance on writing high-quality reviews lists what it wants to see. Paraphrased:

1. Evaluate from a user's perspective and show you know the subject.
2. Show evidence of experience: your own photos or other visuals, and links to your own results.
3. Share quantitative measurements of how something performs.
4. Explain what sets the product apart from competitors, and cover comparable products.
5. Discuss pros and cons based on your own research.
6. Describe how the product has changed from previous versions.
7. Identify the key decision factors for the category and how the product does on each.
8. Link to other useful resources, and consider linking to more than one seller so readers can choose.

The last point is worth noting for affiliate sites. Google says users prefer having more options to buy, and that it builds trust when readers can see how many products were tested and how. Showing several shops' prices for the same product is both better for the reader and in line with that guidance.

Who, How and Why

Google's page on creating helpful, people-first content suggests evaluating content by who made it, how it was made and why. For affiliate pages that translates to concrete questions: Is there a byline, and does it lead to information about the author? Is it clear how products were chosen and evaluated, and whether automation or AI was used? Would the page exist if there were no commission, because readers actually need it?

Structured data on affiliate pages

• Product markup: affiliate pages are not eligible for merchant listings, which are only for pages where the product can be bought. Review and comparison pages fall under product snippets.
• Several sellers: Google describes AggregateOffer for a product sold by multiple merchants.
• FAQ rich results: Google stopped showing them from 7 May 2026, except for well-known, authoritative government and health sites. Keep FAQs if they help readers; do not expect them to appear in search results.

Site reputation abuse and coupon sections

Google's site reputation abuse policy targets third-party content published on a site to exploit its ranking signals. Two points from Google's own clarification matter for affiliates: affiliate links that are marked appropriately are not considered site reputation abuse, and a publication that is actively involved in producing its coupon section, so readers understand how coupons are sourced, has no need to block it. In August 2026 Google changed how manual actions under this policy apply in the EEA, following discussions with the European Commission.

AI features: no special tricks

Google's documentation says there are no additional requirements or special optimisations to appear in AI Overviews or AI Mode, and a May 2026 guide says you can ignore "chunking", llms.txt files and inauthentic mentions. If you want to limit what Google shows from a page, the controls are the existing ones: nosnippet, data-nosnippet, max-snippet and noindex.

Page speed and widgets

Product boxes, comparison tables and price widgets are often the heaviest thing on an affiliate page. Google's Core Web Vitals thresholds for a good experience are an LCP within 2.5 seconds, an INP under 200 milliseconds (INP replaced FID as a Core Web Vital on 12 March 2024), and a CLS under 0.1. The usual widget problems are layout shift when the box loads and slow main-thread work from third-party scripts. Our WordPress product boxes guide covers the fixes.

Audit checklist for an affiliate page

1. Every affiliate link, including those in widgets and tables, has rel="sponsored" (optionally with nofollow).
2. Every affiliate link or product box has a visible advertising label next to it.
3. The page does at least one thing from Google's added-value list: price information, original review, testing, navigation or comparison.
4. No product description is copied from the shop as the main content.
5. Claims of testing are backed by visible evidence, or the word "test" is not used.
6. There is a byline and a short explanation of how products were chosen.
7. Readers can see more than one place to buy, where that exists.
8. Prices and stock are current, with a visible "price checked" date or automatic refresh.
9. Widgets reserve their space and do not push content down while loading.
10. The page would still be worth publishing if the links earned nothing.

Where AffiFeed helps

AffiFeed's embeddable product cards and comparison tables add rel="nofollow noopener sponsored" to every product link and lazy-load images, and they are built from the Partner-Ads and Adtraction feeds you choose, so prices come from the latest import rather than from copy-paste. They are there to support the review you wrote, not replace it. See the feature overview.