USB C is the latest industry-standard connector for transmitting data and power. Like Lightning and MagSafe cables, USB C has no up or down orientation. Since it uses a new connector, you may have lots of cables and power supplies that are hanging around with micro B connectors. Instead of throwing those out, up-cycle them! Plug this adapter onto the end of a micro B cable and now it's a USB C.
Works great with any device that has a USB C port, especially the Raspberry Pi 4 so that you can continue to use Micro USB power plugs