A soffit is an architectural feature that is installed to cover the underside of a roof overhang. It is the exposed siding underneath the roofs overhang. The term "soffit" comes from the Latin word "suffixus," meaning "fixed underneath". Soffits are important for several reasons, including:

• Aesthetics: Soffits provide a finished appearance for the exterior of a home.

• Ventilation: Soffits have venting that helps keep a steady airflow between the roof and attic. This is important because it helps prevent moisture buildup and mold formation in the attic.

• Protection: Soffits protect the structure of a home from water damage.

Soffits can be made from a range of materials, including wood, fiber cement, and composite boards. They come in a variety of colors and styles, and its common to choose a soffit that matches or coordinates with the rest of the homes exterior appearance.