Definition
USDC is a stablecoin issued by Circle and designed to maintain a reference close to the U.S. dollar.
Blockchain representations
USDC is available on several networks. Each implementation can use different contracts and standards even though it keeps the same commercial name.
Issuer and reserves
For a centrally issued stablecoin, the reserve model and issuer policies are an important part of how it works.
What differences to study
When comparing stablecoins, it is useful to understand issuer, technology, available networks, reserves, liquidity and operating mechanisms without turning that comparison into a buying recommendation.