What types of production parts are best suited for 3D printing?

“Additive manufacturing is particularly well-suited for complex geometries, lightweight structures, customized components, short-run production 3d printing, and parts that would be difficult or costly to manufacture traditionally. Common applications include housings, enclosures, jigs and fixtures, medical devices, robotic components, aerospace and drone parts, and production-ready end-use components where performance, speed, and design flexibility are important.”