3D printing works by creating three-dimensional objects layer by layer from a digital model, typically using materials like plastic, metal, or resin. This technology employs various processes, such as fused deposition modeling (FDM) or stereolithography (SLA), to build precise structures. Applications of 3D printing include rapid prototyping, custom manufacturing, and even medical uses, such as creating prosthetics and tissue scaffolds. Its ability to produce complex designs efficiently and with less waste has transformed industries, enabling innovative production methods and design possibilities.