Video adapters are needed when different devices use incompatible interfaces. They solve the problems of connecting a modern laptop to an older monitor (e.g. USB-C to VGA / DVI), using a projector for presentations or using additional monitors for more efficient work. The adapters ensure that image signals are transferred seamlessly and in high quality between devices, making them essential for everyday and workplace functionality.

Adapters are available in both passive and active models. Passive adapters provide simple signal transmission and are suitable for situations where devices support compatible standards. Active adapters, on the other hand, convert the signal between different technologies, such as DisplayPort to HDMI.