system
A chat on subreddit /r/pcmasterrace
human
Can I get an ELI5 of what that means/meant?

E: Probably shouldn't have said ELI5. I have a rough knowledge of how mining is and how you are being rewarded for verifying transations on the blockchain, just not how proof of stake changed things.
gpt
When coins are mined, your computer is basically given increasingly difficult math problems (verifying the "blockchain"). When your computer solves one of those problems first, it shows proof of work and gets the coin reward. It takes more energy and resources as time goes on when the calculations get increasingly difficult.

With proof of stake, you put a certain amount of coins on deposit. The network selects who gets to do the calculations based on how much you've staked, basically how many coins you put in and how long they've been there. The selected "winner" gets to do those Blockchain calculations, then other people verify that they were correct. Once verified, you and the verifiers get rewarded in coins proportional to the work done and the stakes everyone had.

It's all complicated and hard to break down, but I hope this helps.