Pelletizing is when we take small pieces of something, like wood or plastic, and put them through a machine that squishes them together really tightly. This makes them into small balls called pellets. Pellets are good because they take up less space than the original material, and they are easy to transport and store. We can use pellets for lots of different things, like making fuel for heating, or making toys and other products. It's kind of like making mini meatballs, but instead of using meat, we use other materials like wood or plastic.