When you see “65W Type-C adapter”, that points to a charger that:
Uses a USB-C (Type-C) port for output (power delivery).
Can supply up to 65 Watts of power under certain voltage/current combinations (depending on what the connected device requests).
Supports USB Power Delivery (PD) protocol (often PD 3.0) plus possibly other fast-charge standards, so it can adjust voltage and current to match the device's needs (phones, tablets, laptops).
Accepts a wide range of input voltages (often 100-240V AC, 50-60Hz) so it can be used in different countries without needing a converter.
Has several safety and protection features (overcurrent, overvoltage, short circuit, overtemperature).