Okay kiddo, so imagine you're playing with matches in the woods and accidentally start a fire. That fire can quickly spread and become a big, dangerous wildfire.
To stop the fire from spreading, firefighters use different tools and methods to put it out. They might use big trucks that carry water, special hoses called fire hoses, or airplanes that drop water on the fire from above.
They also try to prevent fires from starting in the first place by encouraging people to be careful with things that can start fires, like matches, cigarettes, or campfires. Sometimes they even make rules about when and where you can have a fire outside.
So the idea of wildfire suppression is to stop fires before they become really big and dangerous by putting them out as soon as possible. This helps protect people, animals, and the environment from harm.