An NFT collection is a digital art collection which constitutes a limited number of unique NFTs created by an artist (or group of artists). Typically, NFTs under a collection contain a similar artistic style, but possesses individual traits and rarity. The number of NFTs in a collection differs, for instance BAYC features 10,000 PFP (profile picture) apes, while PudgyPenguins is an 8,888-piece collection.