Controlled burns clear brush on the forest floor to make way for saplings to grow. They also assist in replenishing nutrients to the soil. Wildfires can be bad in the sense that they can kill animals if they have not relocated.
Controlled fires can clear brush, trash, and make new land for many things such as ranger stations and so on. It also helps fertilizer the soil. The only bad thing is it might kill living things such as insects and animals.
