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Do I need robots.txt?

From my understanding robots.txt is only needed to do something different from the norm like exclude a certain file directory and such, but if this is true why do so many people think it is important on every website? Should I just put it on every website to be sure?

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marked as duplicate by John Conde Feb 20 '12 at 20:37

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up vote 2 down vote accepted

If you don't have anything that you wan't to tell the searchengines you don't wan't indexed (or crawled) don't. It doesn't impact your indexing.

See this question answered by Google.

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