Official Google answers to common SEO questions

Question:

What role does being in DMOZ play in rankings?

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Question	Views
Does Google see automatically generated content as a bad thing (i.e. spam)?	1,355
Is it OK to sell links as long as we use the nofollow attribute?	1,091
Does PageRank take into account cross-browser compatibility?	1,030
Some people are under the impression that blogs are good for SEO only if they're updated frequently. How much does frequency play into PageRank for blogs and other dynamic sites?	1,349
Can I tell Google not to display the date in my site's snippets?	1,111
Do your SERPs return the exact same results on all browsers?	1,090
How long should it take for my RDFa markup to appear in search results as a Rich Snippet after completing the submission form?	1,098