One of my friends, [DK](http://www.purposeinc.com), had a chance to visit [Facebook](http://www.purposeinc.com/pwp/2009/03/04/facebook-advertising/) a few weeks ago and he learned some cool stuff about it.
* There are 175 million active users.
* The fastest-growing demographic is those over 30
* The average user has 120 friends
* There are 850 million photos uploaded every month
If you want to learn more about Facebook, check out [DK's blog](http://www.purposeinc.com/pwp/2009/03/04/facebook-advertising/).
Neil Patel is the co-founder of KISSmetrics, an analytics provider that helps companies make better business decisions. Neil also blogs about marketing and entrepreneurship at Quick Sprout.
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