To rate a profile, when you are on someone's profile page, just look below the profile picture, on the left side. You will see a LIKE button (it is customary to LIKE everyone you visit), and you will see 11 cherries below that. It is customary to click on the far right cherry, to rate everyone an"11" if possible. You only have a certain number of 11s per day, so if it does not allow you to rate an 11, because you are out, then it is OK to rate a 10 (the cherry right next to the 11).