The Rockwell Hardness Test is a method used to measure the hardness of materials, particularly metals and alloys. It involves pressing a hard indenter into the material's surface under a specific load. The depth of the indentation is then measured, and the hardness value is calculated based on this depth. This test is popular due to its speed and simplicity. Different scales, such as Rockwell A, B, and C, are used depending on the material being tested. The results help engineers and manufacturers assess material properties for various applications, ensuring quality and performance standards are met.