What is Swarm ETH?

Could you elaborate on Swarm ETH, please? I've heard of Ethereum but not Swarm ETH specifically. Is it a new cryptocurrency? Or is it a service, tool, or platform related to Ethereum? Could you explain the key functionalities and benefits of Swarm ETH? How does it differ from other Ethereum-based projects? Also, what are the potential risks or challenges associated with Swarm ETH? And finally, how can individuals or businesses get involved with Swarm ETH? Thank you for your time and insight.