3D printing, also known as additive manufacturing, allows objects to be built layer by layer from digital files. It enables the creation of highly complex objects that could not be manufactured through traditional subtractive methods. A variety of materials can be used including plastics, metals, ceramics, and more. 3D printing is impacting manufacturing by reducing costs, waste, and inventory while allowing for increased customization directly from digital files without the need for assembly. This technology is disrupting existing business models and supply chains by enabling on-demand, localized production.