An adhesive is a substance used to bond two surfaces together. It can be made from natural or synthetic materials and comes in various forms, such as liquids, pastes, or tapes. Common types of adhesives include glue, tape, and epoxy. They are widely used in construction, manufacturing, and everyday tasks like arts and crafts. Adhesives work by creating a strong connection between surfaces through chemical or physical interactions. Some adhesives are designed for specific materials, such as wood, metal, or plastic, while others are more versatile. Proper application and curing time are essential for achieving optimal strength and durability.