Ethereum is a technology that lets you send cryptocurrency to anyone, but in the first place It also powers applications that everyone can use, and no one can takedown. It's the world's programmable blockchain.

Ethereum builds on Bitcoin's innovation, with some big differences.
Both let you use digital money without payment providers or banks. But Ethereum is programmable, so you can also use it for many different digital assets – even Bitcoin!
This also means Ethereum is for more than payments. It's a marketplace of financial services, games, and apps that can't steal your data or censor you. It's the Future.

https://www.udemy.com/course/solidity-ethereum-in-react-next-js-the-complete-guide/