What Is The Genre of Performance Poetry Anyway?!

After spending four hours doing research on performance poetry and getting lost on youtube in the varieties of this type of art (I love it!), I've realized that I'm still not exactly sure what the genre of performance poetry really is. Maybe by describing the performance poetry genre by looking at this Rives poem I'll get closer to understanding what this genre is all about. I guess this will be a little bit of both a summary and a discussion of genre.