what do they mean?
what do you get out of them?
How do you rank up?
The ranks on the forums are dependent on how many posts you have made. Therefore You rank up by posting more. Here is an extremely helpful thread telling you all of the ranks, and when you attain such ranks.
You can view your current post count in the top right by clicking “My Profile”.
You rank up by posting.
When you get to Spartan - Iron, you get access to a signature.
For more info, click here.