What is Proof of Stake Authority (PoSA)?
Normally, securing a blockchain (like a public record of transactions) involves solving puzzles or using lots of computing power. Proof of Stake Authority (PoSA) is a new method that's like a combination of two existing methods. Imagine a group of people working together to secure a document. Some people are chosen based on how much "stake" they have in the system (like ownership), and others are chosen based on their "authority" or reputation.