Bricks have been used as building blocks for thousands of years. They are made by shaping clay and then firing it to harden it. There are three main production methods - extruded, molded, and dry pressed. The manufacturing process involves preparing the clay material, shaping the bricks, drying them, and firing them in a kiln. Firing transforms the bricks from porous to hard through a process called vitrification. Bricks are durable, resistant to fire and weathering, and require little maintenance making them a practical building material.