It is like Myspace but without all of the spam and more features. Unlike other sites, there are so many custom options that the user can tweak to make their site page do exactly what they want. You can see how this guy created his own page here:
All of the members say that it is the best site on the internet and should be huge. I really do not know why it isn't. I have a few other sites that I hardly even touched and Google sends me a flood of visitors to them daily but not this site. If the site interests you please join and feel free to post on the forums to get some activity going.