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Reciprocal Links in SEO: What Google Allows, What It Detects
Reciprocal links — site A links B, B links back — are not banned. Google's policy bans 'excessive' exchanges and partner pages that exist 'exclusively' for cross-linking, verbatim, while explicitly allowing qualified links. The three forms of reciprocity, why reciprocal pairs are the easiest scheme to detect in a link graph, the four rules if you swap at all, and the better trade: being worth citing.
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