Masonry mortar is a mixture used in construction to bond bricks, stones, and other masonry units together. It typically consists of a combination of cement, lime, sand, and water. The mortar provides strength and stability to structures while also allowing for some flexibility to accommodate movement. There are different types of masonry mortar, including Type N, Type S, and Type M, each designed for specific applications and strength requirements. The choice of mortar type depends on factors such as the type of masonry being used and the environmental conditions the structure will face.