Overmolding in electronics is a sophisticated manufacturing technique where a new layer of plastic is molded over existing electronic components or assemblies. This process not only adds a protective layer to the electronics, safeguarding them from physical impact and environmental factors, but also allows for the integration of additional features such as buttons, grips, or complex geometries. 

Overmolding enhances durability, improves the user interface, and contributes to a more refined and ergonomic design. It's commonly used in the production of mobile phones, wearable devices, and various consumer electronics for its ability to combine functionality with a sleek appearance.