Fused Deposition Modeling (FDM) is a popular 3D printing technique 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. This method is widely used for prototyping and manufacturing because it is cost-effective and easy to use. FDM printers can work with various materials, including PLA and ABS, making them versatile for different applications, from hobby projects to industrial parts.