A sink strainer is a small device placed in the drain of a sink to catch food particles and debris. It helps prevent clogs by trapping waste while allowing water to flow through. Sink strainers are commonly made of materials like stainless steel or plastic and come in various sizes to fit different sink types. Using a sink strainer can save time and money by reducing the need for plumbing repairs. They are easy to clean and can be removed for washing. Regular maintenance of a sink strainer ensures that it functions effectively and keeps the drainage system clear.