There is a very short answer which I’ll give a minute. But I’ll tell you a little story first which is at PubCon a few years ago which is a WebmasterWorld Conference somebody said, “Do you use Google Analytics in Web spam?” And I said, “Not only doing not used in Web spam, I promise you, my team will never go and ask the analytics team to use their data.”
And we’ve held true to that promise. And I got asked this at the most recent PubCon and I was like, “Well, I know we don’t use it in Web spam. I don’t know about all of search quality. I don’t think that we do. But to my knowledge, no one uses it.”
When I saw this question, I went ahead and I emailed the most senior, most knowledgeable person who would know about this. And I said, “We don’t use Google Analytics in our ranking in any way, do we?” And the one word reply was, “No.” So, there you go.
by Matt Cutts - Google's Head of Search Quality Team