What is an Alt in Tera?

Many players tend to love playing the online game, tera from Korea, because playing tera will bring them a lot of fun. And once they play tera, they won't miss alt. But for us, before we joining the game, we need to know something about the Alt. So , what is an alt?
As is explained in the official website of tera, "Alts are secondary (or tertiary, and so on) characters on the same account as a player’s main character (“main” for short)."
Generally, an alt will not the primary focus of a player’s time and effort, unless the alt is leveling up to become the new main. The alt’s progression benefits from the main in several ways, such as unused equipment, an infusion of tera gold, and the skill and experience the player earned through earlier gameplay.
Source: tera.enmasse