A sink protector is a guard or tray placed inside the sink to shield its surface from scratches, stains, and damage due to everyday use. They are typically made from durable materials such as silicone, rubber, or stainless steel, providing a barrier against pots, pans, dishes, and other kitchenware. These protectors not only help maintain the appearance of the sink but also extend its lifespan, ultimately saving homeowners money on repairs and replacements.