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An introduction to Facebook, explaining what people use Facebook for and what Facebook is capable of.

Facebook is the world's most popular social network. It's a website where you can create a list of friends and family and automatically get updates on what they're up to. Facebook uses everything the web has to offer, short messages, photos, videos, links to other websites, virtually anything you can think of. The difference is that it's all presented in an easy to read news feed or list that gives you up to the minute updates about what your family and friends are doing.

Think of Facebook as an interactive postcard giving you updates on a friend's latest holiday or photos of the new baby or a home renovation. Friends will point to news stories they think are important, comment on each other's photos and videos, and just generally have a conversation about, well, anything at all. Facebook's search function lets you find specific people and once you find them you can add them to your friend's list to get their news and photos as well.

Don't want everyone to read your conversation? There's a private messaging system too that works like traditional email. Facebook is a great way to keep in touch with all your friends and family in a light-hearted way. Your niece might not put up too much important news, but at least you know what's happening in her world.

There are lots of things you can do with Facebook. Almost anything you can think of. It lets you plan events and get RSVPs from your guests and if you have Facebook installed on your smartphone, you can tap a button to post that you've arrived home from a holiday so people know you've travelled safely. Really, Facebook is all about keeping those lines of communication open and that's what it does best.