What are 3 things Celo is used for?

Can you elaborate on the various uses of Celo? I'm particularly interested in learning about the top three applications or functions it serves. For instance, does it facilitate cross-border payments? Does it enable the creation of decentralized applications? Or does it provide a platform for digital asset issuance and management? I'm eager to understand the core utilities that Celo offers in the realm of cryptocurrency and finance.