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

Introduced in 2017 by [[Gavin Wood]]

The Proof of Authority model relies on a limited number of block validators and this is what makes it a highly scalable system. Blocks and transactions are verified by pre-approved participants, who act as moderators of the system.

Some consider PoA to be a modified PoS, which leverages identity instead of coins. Due to the decentralized nature of most blockchain networks, PoS is not always suitable for certain businesses and corporations. In contrast, PoA systems may represent a better solution for private blockchains because its performance is considerably higher.