Filler materials are substances added to products to enhance their properties or reduce costs. Commonly used in construction, manufacturing, and art, these materials can improve texture, strength, or durability. Examples include sand in concrete, sawdust in composite wood products, and clay in ceramics. In addition to their practical uses, filler materials can also affect the appearance of a product. For instance, in cosmetics, fillers can create a smoother texture, while in food, they can add bulk without significantly changing flavor. Overall, fillers play a crucial role in various industries by optimizing performance and affordability.