Your Facebook profile is the Web page other members will see if they look you up. It gives people an idea about who you are and what your interests include. Facebook assumes that many of the people with whom you'll want to connect work for the same company, went to the same school or live in the same town as you.
To make it easier to find friends both old and new, Facebook gathers information about you and everyone else to create a dense network of contacts. The upside is that you'll be able to see old classmates or coworkers who have Facebook accounts; the downside is that everyone else in that network will be able to find you. You can choose not to answer questions or to adjust privacy settings so that others can't find you, but that tends to defeat the purpose of a social networking site.
Business owners, artists, bands and public figures can make special Facebook profiles. Instead of becoming friends with the owners of these accounts, you can become a fan. If you work for a company that doesn't have a presence of Facebook, it's a good idea to discuss a strategy with others before creating an account -- most human resources departments don't care for surprises.
You can customize your Facebook profile using Facebook applications, some of which were developed by members just like yourself. In the next section, we'll learn about the rich world of Facebook applications.