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http://www.morevisibility.com/analyticsblog/

The Analytics and Site Intelligence Blog

As I mentioned in my last post, AdWords Bots in Google Analytics (GA), we’ve seen more and more bot traffic registering as visitors in GA. (Bots are automated programs that normally don’t fire JavaScript or images, so this traffic shows up in web server logs, but not in Google Analytics.) In this post we’re going to discuss bots from Yahoo! and Microsoft, why it’s important and how to identify the traffic and see if it’s affecting your site. Why is this important?
http://www.lunametrics.com/blog/ How To Optimize Your New Google+ Page

Luna Metrics