One of our clients asked us how the Facebook "like" button worked, so we figured we would create a blog post about it.

Facebook has provided a way for their users to share with their friends various things that they "like" including web sites on the Internet. A web site simply adds the Facebook "like" button to the pages of their web site. If a visitor to the site clicks the button, Facebook will be initiated to ask them for their Facebook user account. Then on the visitor's Facebook account, it will indicate on their list of activities (called their "Wall / News Feed") within Facebook that the person "likes" the web site. The friends of that visitor will then be able to see the individual's activity list and the description will provide a link from Facebook to the web site.

Or in other words, it's a way to get people to tell their friends about things they like and provide their friends a way to go find out more information about it. In the end, the visitors to your web site help to advertise for your company/organization.

We use the Facebook "Like" button on our blog - see directly below, under the section "Like It. Tweet It. Buzz It. Digg It."

For more details visit: http://developers.facebook.com/plugins