The international shooting sport federation is a group of people who like to play a game where they shoot at targets with guns or other types of shooting equipment. They play this game all around the world, which is why it's called an "international" group.
The group has rules they must follow such as how far away they stand from the target, how many bullets they get to shoot, and how many points they get for hitting certain parts of the target.
The group also has special competitions where people from different countries play against each other to see who is the best at shooting. These competitions are called "international shooting competitions" and they can be very exciting to watch.
The international shooting sport federation is like a big family of people who enjoy shooting games, but they also make sure everyone is safe and follows the rules.