It's a USB-C 3.1 Gen 2 port. This means it can drive a maximum of 10 gigabits per second, which makes it possible for the iPad to drive a 5K monitor at 60 frames per second. However, to do this you will need to purchase a USB-c cable that supports high bandwidth data connections. The cable that comes in the box is for charging only, and is not suitable for taking advantage of the high speed data connection of the USB-c port.
You'll need something like this to transfer data at high speed:
https://www.amazon.com/Anker-PowerL...c378e4376b4eb3f556d59056945fa6&language=en_US