Hi Christo, yes, you can try:

https://www.investopedia.com/terms/p/proof-stake-pos.asp

https://www.youtube.com/watch?v=M3EFi_POhps

https://academy.binance.com/en/articles/proof-of-stake-explained

In short, with POS, consensus on the blockchain is achieved based on how many of the coins are held by any one validator (as opposed to running complex programs to solve maths puzzle, which burn extensive amounts of electricity).

Hence the name "stake" - the more "stake" someone has (meaning, how many coins they hold in their wallet, or how long they have been holding them, or similar methods), the more they are able to validate the transactions.

Hope this helps!