Geotextile is a permeable fabric used in civil engineering and construction, usually made from synthetic fibers like polyester or polypropylene. It is designed to separate, filter, reinforce, protect, or drain soil effectively. Geotextiles help improve soil stability and reduce erosion in various environments. They are commonly used in roads, embankments, drainage systems, landfills, and retaining structures. These materials allow water to pass through while holding back soil particles. This property prevents soil mixing and structural failure. Geotextiles can be woven, non-woven, or knitted depending on their application.