The technology essential for 3D printing is additive manufacturing. This process involves creating three-dimensional objects by adding material layer by layer, allowing for complex designs that traditional manufacturing methods cannot achieve. Various materials, such as plastics, metals, and ceramics, can be used in 3D printing, making it versatile for applications in fields such as prototyping, healthcare, and aerospace. The advantages of additive manufacturing include reduced waste, shorter lead times, and the ability to produce customized items efficiently.