On many websites today, you will see a Facebook “Like” button somewhere on the site, perhaps on a product you are viewing or a blog post. If you click on the Facebook Like button, you will share a story about the web page you are viewing on your Facebook timeline and your friend’s Facebook news feeds. The story will contain a picture, a text description, and a link back to the web page.
By placing Facebook Meta tag code (formerly Facebook’s Open Graph protocol) on your product’s web page, you can define exactly how your product will appear in Facebook.