Facebook like button is now present on roughly 2 million sites around the web . User who `` likes '' 'a page, or clicks an ad - in - place link to it from their browser ( e.g. Google Adsense ) are called " users " and have access to all of that's data about you Button bringing Facebook closer to competing with Twitter in the area of referral traffic .
Facebook like button is now present on roughly 2 million sites around the web . User who `` likes '' your content has more than double the friends than a typical user . Button bringing Facebook closer to competing with Twitter in the area of referral traffic .