Towers are the primary way to defend the base (other than units) from enemies. They are vital to a player's loadout and gameplay. Each Tower has its own unique form of combat or support, and purchase cost related to the tower itself. All of them have a placement limit, which is most commonly 25.
Most Towers are offensive ones, however, some can provide support in its own way, such as buffing other towers, debuffing enemies and spawning units. Each have their own strategy associated to them,