A flatbed trolley is a special tool that helps people move really heavy or large things around. Imagine you have to move a big box of books from one place to another. The box is really heavy, and it's hard to lift it up all at once. That's where the flatbed trolley comes in!
The trolley is like a little cart with a flat surface on it. You can slide the big box of books onto the flat surface, and it'll sit there without falling off. Then, you can push the trolley around, and the box of books will go with it. This makes it much easier to move the box because you don't have to carry it or lift it by yourself.
The trolley usually has four wheels, so it's easy to move in any direction. You can even turn the trolley around in a tight circle if you need to.
People use flatbed trolleys to move all kinds of heavy things, like furniture, boxes, or even big machines. It helps them get the job done faster and without getting tired or hurting themselves.