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.
The next generation of USB tech - small reversible connector designed to support a new wave of faster, more efficient power delivery, 10x faster data transfer and sync speeds than USB 2.0.
Hubs can be used to charge any smaller devices. For instance, you can use a hub to charge phones, tablets, cameras, GPS devices.