USD Coin (USDC) is a stablecoin backed by US dollar denominated assets of at least equal fair value to the USDC in circulation, in segregated accounts with by US regulated financial institutions. Such accounts are attested to (i.e. verified publicly) by an independent accounting firm. You can find those attestations here. USDC allows users to send and receive USD-denominated value around the world using cryptocurrency infrastructure.
USDC tokens themselves are issued by the Centre Consortium, and every token can be redeemed for one dollar — effectively providing a price stable cryptocurrency.
Note that Ledn only sends and receives USDC ERC-20 tokens on the Ethereum network. Any USDC sent to Ledn by other chains will not be received by us and cannot be retrieved.
You can learn more about USDC on their official website.