Is it OK to give specially modified content to WEB crawlers? For example, you give full page content to a search engine indexer, but when anonymous user comes to the page, you show them only part of it, saying that they must register to see page completely. So pages are indexed and present in search results, but when real users come to it they don't see it until they register.

I think it is bad practice and I'm not going to use it. I just remember that Google's terms of service forbids such search engine cheating, but I cannot find this information, so maybe I'm wrong.

Does cheating search engine indexer with specially modified content really violate search engines' terms of service? If it doesn't, can you provide examples of well-known sites that use this technique? I noticed that Quora almost uses this feature. They provide full page when you come from search engine, but when you follow related questions they ask to register. So it is probably not the case.


Such practice is called cloaking, and it violates Google's Webmaster Guidelines.

Cloaking refers to the practice of presenting different content or URLs to human users and search engines. Cloaking is considered a violation of Google's Webmaster Guidelines because it provides our users with different results than they expected.



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