See how many people are using your website right at any moment.  It will show how many are just visiting and how many are registered users.

A website that can’t be easily updated usually ends up with content that never changes.  You tend to visit the website once, and never go back.  A website that gets updated keeps users coming back for more.  It is a service for them.  When this happens, you might be surprised how many people are on your website at all times.