Air Defenses are also known in short form as AD or ADs.
COC Air Defense is unlocked at Town Hall 4.
It cannot deal with ground units like Barbarian, giants. This specially designed to hit out Air units like Dragon, balloons, lava hounds, healer etc.
Clash of Clans Air Defense is a powerful Defensive Building with a very high damage-per-second ratio, capable of defending against air-based units.
Place it wisely to cover as much airspace as possible.” Clash of Clans Air Defense CLASH OF CLANS Air Defense Summary “This anti-air tower is deadly against flying enemies, but can't target foes on the ground. We will also see the best strategy for placing Air Defenses in your Farming and War Base. The Air Defense is essential for protecting the player against high threat, high health air units like the Dragon and Healer. We will see different level of COC Air Defenses, their hit points and damage. It has by far the highest damage per second of any tower (aside from a charged up Inferno Tower) and a very long range. Despite its inability to hit ground units, the Air Defense tower is one of the most important defensive structures in Clash of Clans. In Clash of Clans, the Air Defense is the only tower in Clash of Clans that exclusively targets air units.