Convert laptop to USB 3.0?

My laptop has a USB 3.0 port and it also says that you can charge it but I don't know how to change it

Can you charge with USB 3.0? For sure?

What do you want to charge with it? A cell phone? Then simply plug in your mobile phone and charge it.

I don't know, I just know zero but there's power-off USB Charging I thought I could charge the laptop with it 😅

Means that you can charge a USB device even when the notebook is switched off (e.g. Cell phone)