A sliding tray with holes on both sides of this sofa — what’s it for?

A sliding tray with holes on both sides of this sofa — what’s it for?
Answer: It’s a tray table. It has another piece to it. It’s a tray with matching pegs. The tray goes on top and the pegs slide in. They fit together, so the tray sits tightly. Then you take the tray back to the kitchen and put the sliding part back, so it’s not in the way.