A platform boot is a shoe that has a big chunky sole that lifts you up high off the ground. It's like wearing really tall shoes that make you look taller and like you're standing on a little stage. The sole is usually made out of rubber or thick foam so it feels bouncy when you walk. Some platform boots have laces or buckles to keep them on your feet, while others have stretchy material to help them stay snug. They're super fashionable and fun to wear, but you have to be careful not to trip or stumble because you're so high up!