I don't think a mouse pad is the same as a mouse mat. Gamers usually prefer house mats, which are larger pads placed under keyboards and mouses. Please check this out: https://store.gamersnexus.net/products/gn-wireframe-mouse-mat

Thank you for your answer. But I just wonder why we use place mat instead of place pad?

Mouse pad is correct. When I think of mat I think of a little carpet or rug on the floor. You know how houses have welcome matts on the front door?