What is an example of NFT?

Could you please provide me with an example of an NFT? I'm curious to understand how these digital assets actually manifest in the real world. When it comes to NFTs, I've heard they can represent various types of unique items, but I'm not quite sure what they look like or how they're used. Would you mind giving me a specific instance that illustrates the concept of an NFT? It would be greatly appreciated if you could elaborate on its uniqueness and the value it holds in the cryptocurrency and finance realm.