The alpha group will be most visible in adolescent society. They are the popular crowd, the ones who consistently "look hot," and who care about little else than their appearance. They are, quite simply, celebrities on an adolescent scale. Damian, a character in "Mean Girls," when describing them to the new girl, says, "They're teen royalty. If Northshore [High School] was Us Weekly, they would always be on the cover." In the alpha group, there is always some sort of soap opera going on which everyone knows about. They are sometimes feared or hated, yet somehow, every girl knows every detail about them.
These girls often live in what is considered "girl world." Girl world has a specific set of rules regarding what you can and can't wear, how you can and can't act, and who you can and can't associate with. However, understanding these rules is usually very difficult, as girls don't often know what the rules are until they break them; when they are broken, the rules become painfully clear.
In the beta group, a person will find a group of girls that is generally trying to follow the rules of the alphas without being clear on what they specifically are.