A Standard Penetration Test (SPT) is a common method used in geotechnical engineering to assess soil properties. During the test, a hollow steel tube is driven into the ground at a specific depth using a hammer. The number of blows required to penetrate the soil a certain distance is recorded, providing valuable information about soil density and strength. The results of an SPT help engineers determine the suitability of the soil for construction projects. This information is crucial for designing foundations and other structures, ensuring they are safe and stable in their environment.