For skins and stuff
I'll admit im not super knowledgable, but from what I know they work like this: you can use the same kind of process used to mine bitcoin to take an image and generate a unique certificate that only you can have. No one else can create a certificate with that image and people can see you own it. it takes a lot of energy to do and you need a powerful computer so only people with high-tier graphics cards can actually do it, and if you change an image by a pixel you can make a new NFT so the whole think is kind of pointless in the end. I don't like the idea of putting it in valorant