Plugable Quad HDMI Adapter adds four video ports to your MacBook or Windows PC
Back in the day, it was common for laptops to have a dedicated video output port, such as VGA or HDMI. These days? Not so much. Instead, computer makers rely heavily on USB-C, hoping you will invest in dongles for your video needs. And so, a USB-C to HDMI adapter, for instance, is a pretty common accessory.
Source: betanews.com