This tutorial assumes you've already logged in to phpBB
Now let's learn how to manage ranks
1) Click Users and Groups
2) Then click Manage Ranks
3) Click Add new rank
From here you can add ranks that will then automatically be given to people as they reach the specified post milestones
4) Enter a Rank Title here
5) This will not be a special rank, so select No
6) Enter the number of posts that must be reached before the user achieves this rank
7) Then click Submit
That's it! The new rank has been added as can be seen here
To delete a rank, you would click the delete icon here
To edit an existing rank, click the edit icon here
This is the end of the tutorial. You now know how to manage ranks in phpBB