Content Experiments helps you optimize for goals you have already defined in your Google Analytics account, and can help you decide which page designs, layouts and content are most effective.
https://support.google.com/analytics/bin/answer.py?hl=en&topic=1745207&answer=1745147#utm_source=blog&utm_medium=gwoblog&utm_content=content&utm_campaign=content_experiments_launch
Analytics and Tracking · A/B Testing
Get access to data on 111,002 websites Google Content Experiments Customers. We know of 8,351 live websites using Google Content Experiments and an additional 102,651 sites that used Google Content Experiments historically and 2,595 websites in the United States.
Get a list of 111,002 websites using Google Content Experiments which includes location information, hosting data, contact details, 8,351 currently live websites and an additional 12,844 domains that redirect to sites in this list. 102,651 sites that used this technology previouslyand 2,595 websites in the United States currently using Google Content Experiments.
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