USB Power Delivery (PD) is a universal charging standard that enables compatible devices to charge at much higher power than normal. The technology supports bi-directional charging and data transfer from both host and peripheral. Fast charge your Pixel 3 or iPhone, and then use the same charger to power your MacBook. Get more detailed information from this blog post.
Apple Inc.'s MFi Program ("Made for iPhone/iPod/iPad") is a licensing program for developers of hardware and software peripherals that work with Apple's iPod, iPad and iPhone