For starters, NFTs are the only identifiable tokens on the blockchain. Each marker "points to" something. These "things" can be blogs, photos, videos, 3d renderings, photoshop files, anything you can think of. Most of the time, these "stuffs" exist in a decentralized storage layer such as IPFS (an interplanetary file system developed by Protocol Labs) or Arweave (collectively owned, permanent, decentralized "permanent network") , which makes them resistant to single points of failure and censorship.