Reciprocal links happen when site A links to site B and site B links back to site A. Plenty of these occur naturally, between partners, integrations, or sites that cover the same topic. Google's spam policies only target excessive link exchanges arranged for the purpose of cross-linking, so the question is always why the links exist and how many there are.
Natural reciprocity
In SaaS, reciprocal links are everywhere for good reasons. Two products integrate and each lists the other in its integrations directory. A company and its agency partner link to each other's pages. A podcast host links to a guest's site and the guest links to the episode. None of these exist to game rankings, and they serve real visitors.
When it becomes a link scheme
Google's spam policies list "excessive link exchanges" and partner pages created exclusively for cross-linking as examples of link spam. The warning signs are swaps arranged purely for the link, swaps with unrelated sites, swaps negotiated through link-trading groups, and pages that exist only to hold traded links.
- Outreach emails offering a link back in return for a link
- "Partners" or "resources" pages full of unrelated sites
- Three-way swaps designed to hide the reciprocity
- Swaps tied to keyword-rich anchor text
What to do with existing swaps
If your site has a history of link trading, the usual approach is to remove or qualify the outbound links you placed as part of trades, and stop the practice. Google says its systems try to neutralize unnatural links, so the goal is to clean up rather than to panic.
Example
Integration listings versus a swap request
An illustrative scheduling app, Clockfennel, and a CRM vendor each list the other on their integration pages, with setup instructions. That reciprocity serves users. In the same week, Clockfennel receives an email from an unrelated travel blog offering to link to it if Clockfennel links back. The first is normal business; the second is the kind of exchange Google's policies describe.
Common mistakes
Treating every mutual link as risky
Removing links to genuine partners because they link back helps nobody.
Joining link-trading groups
Organized swap networks create exactly the pattern Google's policies name.
Questions
Google does not give a number. The policy concern is excessive exchanges made for the sake of the links, so judge by intent and relevance rather than a count.
