If you have an area rug that slips and slides around when you step on it, you should invest in a rug pad. Rug pads keep your area rug in place. They also add some padding and space underneath your rug, separating it from the flooring underneath and adding an extra layer of protection for the hard flooring underneath.
General rug pads are made from slip-resistant webbed material and do a good job of preventing your rug from sliding when you step on it. You can order in a roll and cut it to size or order a pre-cut pad in the specific size you need.
Premium felt or polyester-blend pads are coated to help them stick to the floor, offering extra protection against movement and slippage. They also help to prevent scratches under the rug and are best for adding comfortable padding.