A joint terminal attack controller is someone who helps military forces accurately hit their targets during a battle. They're like superheroes who guide planes and helicopters to drop bombs and shoot missiles in the right place. They work closely with the pilots and ground troops to make sure everyone is on the same page about the target location and what kind of weapons to use.
Think of it like a game of darts, but instead of throwing the dart yourself, you are guiding someone else to throw it for you. The joint terminal attack controller tells the pilot where to go, when to drop the bombs or shoot missiles, and how to aim them. The controller must keep in mind many important factors like the distance of the target, its size, and its location to not cause collateral damage to innocent people or buildings.
When a joint terminal attack controller is not in battle, they are usually training and preparing to be ready for when they're called to action. It's a very important job that requires a lot of training, skills, and focus to make sure the mission is successful and everyone is safe.