Notches are small indentations or cuts made in a surface, often used for measurement or marking purposes. They can be found in various materials, including wood, metal, and plastic. Notches help in aligning objects, indicating specific points, or providing grip in tools and machinery. In woodworking, notches are commonly used to create joints, such as in the construction of furniture or structures. They can also serve aesthetic purposes, adding decorative elements to a piece. Notches are essential in many fields, including engineering and design, where precision and accuracy are crucial for functionality.