Cat litter is a material used in a litter box to absorb moisture and control odors from cat waste. It typically comes in various forms, including clumping clay, non-clumping clay, and biodegradable options made from materials like corn or recycled paper. When a cat uses the litter box, the litter absorbs urine and helps to mask the smell of feces. Regular cleaning and changing of the litter are essential for maintaining a hygienic environment for both the cat and its owner. Proper disposal of used litter is also important for environmental considerations.