Ethereum switching from proof-of-work to proof-of-stake.
To understand what those two things are, read this: https://www.techtarget.com/whatis/fe...20transactions.
To understand what Ethereum is doing, read this: https://fortune.com/2022/09/14/the-e...t-to-watch-for
The "merge" which accomplished this occurred yesterday, but there is still some time to wait to see if it worked out.