Most devices come with USBC. I have USBC on my tablet and my cell phone. With this adapter, it allows me to connect my phone and tablet to a USB port.
This works beautifully for plugging a USB-C cable into a USB-A power adapter. It let me continue using my in-wall power extender (4 outlets + 4 USB power outlets, 3 USB-A but only 1 USB-C) when I suddenly had 2 devices that needed to charge using USB-C. Used this adapter to plug my new USB-C phone into one of the USB-A power outlets and all is still good! (Can't say the same for the USB-C to USB-A adapters from another vendor - the Hannord ones work great, but the ones from the other vendor charged exactly 1% overnight.)
I was able to upgrade my notebook flawlessly from HDD to SSD.