Google Tackling Site Reputation Abuse By Treating Some Sites Within A Site
Briefly

At the Google Search Central Conference, Danny Sullivan tackled the challenge of balancing first-party trust signals with third-party content: "If third-party content takes advantage of first-party signals, it creates confusion for users." The solution? Treat distinct areas as "sites within a site" or even move them off-domain to build separate trust and identity.
If you've built up site signals based on first-party content and then third-party content takes advantage of those signals, it creates confusion for users. Treating distinct areas as 'sites within a site' can help address this issue.
If you're venturing into something entirely different, consider creating a separate site to build its own reputation and identity.
We also know the site reputation abuse policy is still only handled with manual actions and is not algorithmic yet.
Read at Search Engine Roundtable
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