Your profile is important - it tells others about you and allows them to find you in the member list. 

If you have not updated your profile click on the link below.  Its really easy to fill out.

My profile

You can fill in as much as you want visible.  The address and phone infomation is never visible (they have a red X next to them).  Click the update button when you're done.  Don't forget to fill in the 'Contact Info' tab with your name as well.  First name will be visible to others so they can find you more easily - last name is not shown (just enter a space if you don't want to enter it).