How does Google detect spam?

Google uses automated spam detection, including SpamBrain, and manual actions to address pages and links that break its spam policies.

The model includes stored information about spam and other risks. The exact effect of Google’s private checks is unknown. A relevant page can still have a spam problem that affects whether it appears or where it ranks.

What gets checked

Examples include link schemes, hacked pages and cloaking. Cloaking means showing search engines different content from what visitors see. Google’s policies also cover content created at scale primarily to manipulate rankings.

A link count alone cannot tell you whether backlinks are useful or legitimate. Open the linking pages and check why the links are there.

Check indexing problems first

In Search Console, inspect the affected URL. A noindex instruction can keep a page out of search. A server error can stop Google fetching it. A canonical tag can identify another URL as the main version.

Those problems need fixing, but they don’t mean Google applied a spam penalty.

Investigate a ranking drop

Open the Manual Actions report in Search Console. If it reports an action, read the affected pages and the reason given.

Then check the Performance report for the exact page and queries that lost rankings or clicks. Did the drop affect one page or several? Did you change the page, its URL or its links? Did the competing results change?

A page falling for two days doesn’t establish a penalty. Save the dates and findings before deciding what to change.

Build links with a reason to exist

A relevant website can link to your page because it helps its readers. Look for that connection when pursuing backlinks.

Keep your pages accessible and their subjects clear. When a problem appears, use the reports and the affected URLs to investigate it.