By the way, what is Glee all about?
Generally, it's about a teacher and a group of outcast students who start a glee club in high school. Each episode plays out like a one-hour musical - relevant songs sung throughout the episode that fit in with the storyline.
While each of the students fit a particular stereotype - the diva, the football player, the head cheerleader, etc. - the storylines and acting are nuanced enough to make it enjoyable and funny.