Is Moonbeam part of Polkadot?

Could you please clarify if Moonbeam is indeed a part of the Polkadot ecosystem? It's important to understand the relationship between these two platforms, as they both seem to play significant roles in the world of blockchain technology and cryptocurrency. Is Moonbeam a parachain, a bridge, or some other type of integration within the Polkadot network? Or does it exist independently, with only connections to Polkadot through interoperability protocols? Your insight would be greatly appreciated.