Siding refers to the material applied to the exterior of a building to protect it from weather elements and enhance its appearance. Common types of siding include vinyl, wood, fiber cement, and metal. Each type has its own benefits, such as durability, insulation, and maintenance requirements. In addition to protection, siding plays a significant role in a home's energy efficiency. Properly installed siding can help regulate indoor temperatures, reducing heating and cooling costs. Homeowners often choose siding based on factors like cost, aesthetics, and climate suitability, making it an important aspect of home construction and renovation.