A folding table is just like a regular table, but it can be folded up to make it easier to store or move around. It's kind of like a puzzle that you can put together and then take apart again whenever you need it.
When you first get a folding table, it usually comes in a flat box with the legs and top separate. To put it together, you have to snap the legs into place on the underside of the table top. They're usually held in place by little clips that you just push in until they lock.
Once the legs are attached, you can stand the table up and use it just like a regular table. But when you're done using it, you can fold the legs back up underneath the table top. This makes the whole thing smaller and more compact, so you can easily slide it into a closet or tuck it away in a corner.
Some folding tables even have handles or straps that make them easier to carry around, which is great if you need to take them outside for a BBQ or over to a friend's house for a game night.
So basically, a folding table is just a table that you can fold up and put away when you're not using it. It's like a magical piece of furniture that disappears when you don't need it, and reappears when you do!