GA Referrer Spam

https://www.adwordsrobot.com/en/tools/ga-referrer-spam-killer The Analytics Referrer/Ghost Spam Blocker from AdWords robot makes it easy to exclude spammy referrer domains from Google Analytics by importing this Google Analytics segment to hide spambots within your old data. If you find a new spambot, you can submit it to Google along with some comments about your ideas or any tips that you may have.Though ghost spam is not harmful, it can pollute your analytics data along with your statistics. You can find a number of ways to fight Google Analytics spam, but if you decide to use GA Referrer Spam filters, you can exclude any spammy domains with this spam blocker.  Rank Tracking