[Felipe]

when you use the "advanced export" feature, it will put the players "vpip" "pfr%" "AF" "steal attempt%" etc........ along with the personal notes that you have on the player. But it will erase the personal notes that you have made if you don't import them into PT
I always import after each session b/c I like the advanced export feature. its a personal choice really. it doesn't matter.

Another use for notes in PT is when you review hands, you can make additional notes on some players that have peculiar or idiosyncratic betting patterns. Then those notes (along with the notes you make in party) will also be exported.

Don't forget to close party during import/export procedures.