Digital collectibles are NFTs (Non-Fungible Tokens). They are similar to a physical collectible, but in digital format. To ensure each digital collectible’s unique authenticity, Sweet uses blockchain technology to demonstrate rights ownership and authenticity. This is similar to receiving a "certificate of authenticity" with unique physical merchandise like a signed baseball card.
Examples of NFTs include digital art, collectibles, virtual reality items, crypto domain names, ownership records for physical assets, and more. Read more about blockchains in here.