The main use of 3D printing technology is to create three-dimensional objects from digital models. This technology allows for rapid prototyping, enabling designers and engineers to produce and test physical components quickly. Industries such as manufacturing, healthcare, and construction utilize 3D printing for customized production and innovative design solutions. Furthermore, it's often employed for creating intricate designs and lightweight structures that would be difficult to achieve with traditional manufacturing methods, making it a transformative approach in product development.