Soil testing is carried out to determine the strength, stability, and bearing capacity of soil before construction. It helps engineers identify suitable foundation types, assess soil characteristics, and ensure the safety, durability, and long-term performance of structures while reducing construction risks and costs. By analyzing the physical and engineering properties of the soil, testing helps prevent structural failures, uneven settlement, and foundation issues. It also supports efficient planning and design by providing accurate data for safe and economical construction. Proper soil investigation is essential for residential, commercial, industrial, and infrastructure projects to achieve reliable and sustainable development.