There are different USDC tokens on separate blockchains, just like having different banks. USDC (ETH) is on Ethereum, and USDC (Flow) is on the Flow network. They might seem alike, but they're on different networks (Banks). Before you move between them, know the networks have small fees for moving funds just like banks. "Bridging" means shifting tokens to another blockchain.
You can use Increment.Fi to turn USDC (ETH) into USDC (Flow) with a small fee.
Learn more about Increment.Fi here -