The new MacBook Pro has USB-C ports for everything – power, I/O, and graphics. And although USB-C ought to support HDMI monitors just fine, I’ve found that it doesn’t work all that well with my 15″ MacBook Pro. I recommend sticking with DisplayPort until Apple resolves the issues.
Did you buy the new MacBook or MacBook Pro? Maybe the Google Pixel? You’re about to enter a world of confusion thanks to those new “USB-C” ports. See, that simple-looking port hides a world of complexity, and the (thankful) backward-compatibility uses different kinds of cables for different tasks. Shoppers have to be very careful to buy exactly the right cable for their devices!