LIKEBUTTON
Like button
The appearance of Facebook's Like button</div></div></div>A like button, like option or recommend button is a feature in communication software such as social networking services, Internet forums, news websites and blogs where the user can express that he/she likes, enjoys or supports certain content. Internet services that feature like buttons usually display the quantity of users who liked each content, and may show a full or partial list of them. This is a quantitative alternative to other methods of expressing reaction to content, like writing a reply text.The above text is a snippet from Wikipedia: Like button
and as such is available under the Creative Commons Attribution/Share-Alike License.