Rules and uses for Prestige Points are here.

Within their Sphere of Influence, PCs may spend Prestige Points for various bonuses. A few representative bonuses are:

Hero’s Luck (1 PP, minimum Fame 1): You gain a +4 luck bonus on a single skill check. You must use this award before you attempt the check in question.

Wanderer (Title, 1 PP, minimum Fame 10): The long time you’ve spent on the road with fellow travelers has enhanced your knack for picking up local customs. Knowledge (local) becomes a class skill for you as long as you have this title.

Favored Territory (Title, 5 PP, minimum Fame 20): Choose a 100-square-mile region within your Sphere of Influence. This is now your favored territory, and you gain a +2 bonus on Diplomacy checks within that territory. When your Fame reaches 30, you can select this title a second time, gaining a second favored territory and increasing the bonus in your first favored territory to +4. When your Fame reaches 55, you can select this title a third time, gaining a third favored territory and increasing the bonus in your first favored territory to +6 and in your second to +4.

More uses for Prestige Points are listed in the rules on the Pathfinder SRD.

The Charter’s current Sphere of Influence:
400 mile radius around their capitol city (encompasses most of Brevoy, including Restov and New Stetven, the River Kingdoms as far as Gralton, and northern Galt as far as the Boarwood and Isarn)

PCs’ current Fame:
Asher 28
Bronin 28
Parin 32
Súrion 29

PCs’ current Prestige Points:
Asher 28
Bronin 27
Parin 32
Súrion 24

The Five Kings’ current Sphere of Influence:
200 mile radius around Oleg’s Trading Post (encompasses half of Brevoy, including Restov and New Stetven, and the River Kingdoms as far as Mivon)

PCs’ current Fame:
Billy 12
Iri 15
Laren 13
Milo 17
Traven 6

PCs’ current Prestige Points:
Billy 12
Iri 15
Laren 13
Milo 17
Traven 6