3D printing, also known as additive manufacturing, is a revolutionary technology that creates three-dimensional objects from digital files. This process involves layering materials, such as plastic, metal, or resin, to build up a final product. Unlike traditional manufacturing methods, which often subtract material to create an object, 3D printing adds material layer by layer, allowing for complex designs and structures that were previously impossible to achieve. This innovation has transformed various industries, from healthcare to automotive, by enabling rapid prototyping and customised production.