After testing Google officially launched its new and own recommendation system +1 Button. The +1 Button will become integrated into various Google own products including the search engine. The system, which now is available to become integrated into websites as well, is a common indicator of the popularity of content and may show favorites and recommendation of friends, if logged in to a Google account. Below is the official blog post about the launch of the system and the homepage of +1 Button with instructions to integrate the system into websites.
Content Recommendations with Google +1 Button
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