Are all USB-C cables the same? What the e-marker chip does
The plugs match. What the cable can carry does not, and some cables contain a small chip whose job is to say so.
Chargers & Cables
What is inside a charger, how it agrees on power with your device, and why two USB-C cables can behave differently.
How USB-C Power Delivery works: the short conversation before your phone charges
A USB-C PD charger does not simply push power at your phone. It lists what it can supply, the phone asks for what it wants, and only then does the voltage change.
Is USB-C the same as Thunderbolt? The plug is shared, the abilities are not
USB-C names the shape of a connector. Thunderbolt names what can run through it. A port can look identical and do very different things.