Official Google answers to common SEO questions

Question:

Will Google remove a page that I don't like from its search results?

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Question	Views
What happens if I link to a good page that later becomes spammy?	1,771
Does Google see automatically generated content as a bad thing (i.e. spam)?	1,355
A site for my client's competitor shows up on a SERP for keywords that never show up in the site anywhere (not even hidden in the source code). How is this even possible, and isn't this spam?	1,200
Does Google try to return results based on signals other than popularity?	1,563
How can Googlebot crawl and index pages that don't have any links to them on my website?	1,097