The mortar used in building walls is crucial for holding bricks or blocks together and keeping out moisture. It also helps correct any imperfections in the bricks when they are laid. This study discusses different aspects of mortar, such as its ingredients, preparation, types, and how it behaves under stress. The researchers also looked at how well different mortars bond with masonry units and how they shrink. They end by giving advice on choosing the right mortar for different types of walls, including ones made with a mix of cement and soil.