Adhesive, commonly known as glue or paste, is a substance used to join two or more surfaces together by creating a strong bond. It is widely used in various industries and everyday applications, ranging from crafts and woodworking to construction and manufacturing. Adhesives can be classified into different types, including solvent-based, water-based, and reactive adhesives, each offering distinct properties and applications. Some adhesives are designed to provide temporary bonds, while others create permanent connections. The choice of adhesive depends on factors such as the materials being bonded, environmental conditions, and desired bond strength. Over the years, advancements in adhesive technology have led to the development of more efficient and environmentally friendly options, making adhesives an integral part of modern bonding solutions.