Soil plasticity refers to the ability of soil to deform and change shape without breaking when subjected to stress. This property is crucial in understanding how soils behave under different conditions, especially in construction and engineering. Soils with high plasticity can retain their shape when wet, while those with low plasticity may crumble or lose structure. The plasticity of soil is often measured using the Atterberg limits, which include the liquid limit and plastic limit. These tests help classify soils and predict their behavior in various applications, such as foundation design and earthworks. Understanding soil plasticity is essential for ensuring stability and safety in construction projects.