3D printing, also known as additive manufacturing, is a process of creating three-dimensional objects by layering materials such as plastic, metal, or ceramic based on a digital model. This technology has revolutionized various industries by allowing for the rapid prototyping and customization of products, reducing production time and costs, and enabling the creation of complex geometries that would be difficult or impossible to produce using traditional manufacturing methods. 3D printing has applications in healthcare, aerospace, automotive, fashion, and many other fields, and continues to advance with new materials and technologies.