Why does this site have levels? Like levels to what its a bit awkward...
One reason, is to encourage peopel to participate and contribute to the site. You also get points fgor promoting the site.
Another reason, is until you reach level 5 your posts have to be approved before going out without review. This keeps the haters off the site, which makes the site much better and a lot mroe enjoyable.
Don't get too hung up on the points/levels as they are mostly just a way for us to keep scammers away. However, they also give us a way to give more access/perks to members who contribute time and thought. Thanks for the question! You can read more on the FAQ page (see link at the bottom of every page).