Cryptocurrencies use proof-of-stake to verify transactions and create new blocks on a blockchain.

A consensus mechanism is a method for recording data in a distributed database or ensuring that the database remains secure

The database in this case is referred to as a blockchain; therefore, the consensus mechanism maintains it

Understanding Proof-of-Stake (PoS)

What Is Proof-of-Stake vs. Proof-of-Work? Using randomly selected validators, Proof of Stake (POS) verifies transactions and creates new blocks. In contrast, Proof of Work (POW) competitively verifies transactions and adds new blocks to the blockchain.

Is Proof-of-Stake a Certificate?