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 printer moves the nozzle in precise patterns to build the object from the bottom up, allowing for complex shapes and designs. FDM is widely used in various industries, including aerospace, automotive, and healthcare, due to its affordability and ease of use. It is particularly favored for prototyping and producing functional parts, as it can work with a range of materials, including PLA, ABS, and PETG.