Thermal paste, also known as thermal compound, is a substance used in computers to improve the transfer of heat from the processor (CPU) to the heatsink that cools it. It is applied directly to the CPU and helps to fill any gaps or imperfections between the two surfaces, allowing for more efficient heat transfer. The paste is typically made of a blend of metal oxides, ceramics, and/or silicone, and is designed to be a highly conductive and durable thermal solution. Without thermal paste, the CPU could overheat and be damaged, leading to system failure or hardware damage. Because thermal paste is an important component in maintaining the health of a computer, it is recommended to use high-quality paste and to reapply it periodically to ensure optimal performance.