Can anyone please explain how the addThis facebook like button works? The code for adding the button is
<a class="addthis_button_facebook_like" fb:like:layout="button_count"></a>
I'm going through the code of a website with pages listing details of different products. There is this fb like button on each of those pages. What exactly is liked here? Since I don't provide any facebook URL which specifies the page or image or anything related to this product that I've already put on facebook, what is this like button liking?