- Facebook social plugins give you another way to share what interests you with your friends and family on Facebook.

- They also let you see what your friends like on the sites that are currently integrated with social plugins.

- This is just another extension of Facebook, like a way to "like" something without having to do so in your Facebook newsfeed.

- You'll know it's a Facebook social plugin because, as long as you're logged into Facebook, you'll see either a Like or a Recommend button with the Facebook icon next to things like news stories or reviews.

- You'll see if any of your friends have also liked this story because they'll be listed here.

- To see what sites are included with social plugins, visit developers.facebook.com/showcase and you'll see all of the sites that are available.