Thermal conductivity is a property of materials that describes their ability to conduct heat. It is a measure of how well a material can transfer heat from one part of the material to another. Materials with high thermal conductivity can transfer heat quickly, while materials with low thermal conductivity transfer heat more slowly. Thermal conductivity is an important parameter in various fields such as materials science, physics, engineering, and geology, as it determines how efficiently heat can be transferred through a material. Researchers study thermal conductivity to improve the performance of materials in various applications, such as in building insulation, electronics cooling, and energy storage systems.