The Like button is an embeddable plugin for third-party websites and Facebook apps. When clicked by a Facebook user, it publishes the piece of content the button is attached to to the user’s wall and the news feeds of their friends. In many cases it also causes the Liked object to appear in the user’s profile and allows the owner of the button to publish news feed updates to the user in the future.
Facebook offers several different implementations of its Like button social plugin. Here we’ll discuss the advantages and disadvantages of different stylistic options, and provide a guide for choosing the Like button implementation that will drive the most clicks and thereby generate the most referral traffic for your website.