What GRR884 said, clean, dry, brush, vacuum, then figure out exactly where you want it. Hold it in place with tape if needed, peel off half the backing with the decal lifted off the carpet, cut the backing away, and stick that half down. Lift the other half, pull the backing, and lay the other half. Step on it. Foot pressure will do the job to get it in place. Adhesive is VERY aggressive, so make sure you get it where you want it. You can pull it up, but it wont be easy. When it gets dirty, you can scrub it with a brush and soap to clean it. Pretty durable.