Teen Wolf Pack

A Teen Wolf Pack describes a grouping of Werewolves and others (both supernatural and human) that works together like a family.

Teen Wolf Packs
Werewolves are social creatures and mostly operate within packs. Characters have stated the following:
 * A Teen Wolf Pack is made up of one alpha (male or female) and a group of Betas
 * The Alpha is the one who leads and makes all decisions that the entire pack follows
 * Werewolves become physically stronger and more powerful once they join a pack. This fact is stated several times throughout the run of the show.
 * Pack membership is voluntary but failing to join most often leaves the werewolf without allies and therefore weaker (see Omega above)

While stated, these rules seem flexible and ill-defined in practice during the early seasons of the show. It is not until Season 5 that we see Scott become physically stronger by bringing all his pack members back together (See A Credible Threat).

Pack Membership
There is still no precise definition of what makes up a Teen Wolf Pack. For example, the lineup of Scott's Pack has changed on numerous occasions, sometimes twice within the same episode, without any apparent decision by Scott or any pack member. Since there is no clear-cut definition, no ritual involved in becoming a member of the pack, we must judge pack membership based on observing character's actions.
 * Example for Illustration Purpose Only -

Based purely on observation Scott's primary pack in Season 3(b) was a mix of humans and werewolves - At the same time - there is a group of apparent non-members or Allies who, like the rest of the pack, fight at Scott's side and work to protect the group - See Scott's Pack for the most recent membership list.
 * Stiles Stilinski - Human
 * Lydia Martin - Banshee
 * Isaac Lahey - Werewolf
 * Derek Hale - Werewolf
 * Dr. Deaton - Druid
 * Allison Argent - Hunter
 * Melissa McCall - Human
 * Sheriff Stilinski - Human
 * The Alpha Twins - Werewolf
 * Kira Yukimura - Kitsune

Alpha Pack
It is possible to have an entire pack of Alpha werewolves. See The Alpha Pack for details.