What is "character advancement" to you?
Is it gaining a bonus to your attack roll or more hit points? Maybe gaining the ability to cast 5th level spells?
Is it completing the epic story about the return of the mythical dragons and fighting the war to save civilization?
Is it defeating the marauding orcs, overcoming the ferocious giant, Glogmog the Black, or clearing the Forest of Tears of the vile demons that laired within to keep the residents of your new keep safe and prosperous?