What does it mean to like a Page or content off of Facebook?
When you click Like on a Facebook Page, in an advertisement, or on content off of Facebook, you are making a connection. A story about your like will appear on your Timeline and may also appear in your News Feed. You may be displayed on the Page you connected to, in advertisements about that Page or in social plugins next to the content you like.
You may see updates to in your feeds and the feeds of your friends from Pages you like. You may also receive messages. Your connection to the page may also be shared with apps on the Facebook Platform.
You can also unlike a Page or piece of content.