Compression testing is a method used to evaluate the behavior of materials under compressive loads. This test measures how a material deforms and ultimately fails when subjected to pressure, providing important data on its strength and durability. Common materials tested include metals, plastics, and concrete. During the test, a sample is placed in a compression testing machine, which applies a controlled load until the material yields or fractures. The results help engineers and designers select appropriate materials for construction and manufacturing, ensuring safety and performance in applications like buildings, bridges, and automobiles.