Is Starknet on mainnet?

Could you please clarify for me, is Starknet currently operating on the mainnet? I've heard some buzz about its potential but I'm not entirely sure if it's already fully integrated and functional on the main blockchain network. It would be great if you could provide some insight into its current status and maybe even discuss any potential implications or benefits of Starknet being on the mainnet. Thank you in advance for your assistance in this matter.