What is a brush used for in minecraft?

A brush is a tool used in Minecraft to create pixel art or manipulate the terrain of the game world. Brushes can be used to paint blocks onto a canvas, sculpt the landscape, or erase blocks from the game world. Different brushes have different functions and can be used to create intricate designs or modify the terrain in creative ways. Brushes are often used by players who want to add personal touches to their builds or create custom landscapes in the game.