Okay kiddo, so a hero shooter is like playing make-believe with your friends, but on the computer.
Think of it like this: there are different characters, or heroes, that have special powers or skills that make them unique. Just like how you might pretend to be a superhero or a princess, you get to pick which hero you want to be in the game.
Then, you and your team of heroes work together to defeat the bad guys. Sometimes you might have to capture an object or protect a certain area, but the goal is always to work together and beat the other team.
But the best part is that you can keep playing and trying out different heroes until you find the one that you like the most! And as you play more, you can get better and better at using their special powers to help your team win.