Fused Deposition Modeling (FDM) is a popular 3D printing technology that creates objects layer by layer. It works by melting a thermoplastic filament, which is then extruded through a heated nozzle. The nozzle moves in a precise pattern, depositing the melted material onto a build platform, where it cools and solidifies to form the desired shape. FDM is widely used for prototyping and manufacturing due to its affordability and ease of use. It can produce complex geometries and is compatible with various materials, making it suitable for applications in industries like aerospace, automotive, and medical.