Thermal mass refers to the ability of a material to absorb, store, and release heat. Materials with high thermal mass, such as concrete, brick, or stone, can help regulate indoor temperatures by absorbing heat during the day and releasing it at night. This property is beneficial for energy efficiency in buildings, as it can reduce the need for heating and cooling. In architecture, incorporating thermal mass into a design can enhance comfort and sustainability. By strategically placing high thermal mass materials in areas exposed to sunlight, buildings can maintain a more stable temperature, minimizing energy consumption and improving overall climate control.