Yeah certificate of authenticity. Like the MLB authorizes a signed baseball by Babe Ruth or something.

thrown

The video on single-use-seals gives some more insights on this.

https://youtu.be/B_3ntBI8x40

goon_retired_acc

The one somewhat compelling case I heard is in situations where a physical item is sold with a paper certificate already.

For example expensive watches - you could mint a NFT for a watch. After that, when the watch is sold the buyer is incentivised to demand getting the NFT, because otherwise the watch would be considered fake.

For each sell a small kickback would go back to manufacturer.

bitcoin

DIBA - Digital Bitcoin Art (NFT)

The one somewhat compelling case I heard is in situations where a physical item is sold with a paper certificate already. 
For example expensive watches - you could mint a NFT for a watch. After that, when the watch is sold the buyer is incentivised to demand getting the NFT, because otherwise the watch would be considered fake. 
For each sell a small kickback would go back to manufacturer. 