The Optimism protocol is a Layer2 protocol that is intended to help Ethereum users speed up and pay less fees for transactions made on the Ethereum network. To achieve this, Optimism works based on a technology known as “Optimistic Rollups”. 

EThis is a “rollups” type of scalability technology, which encapsulates a large number of Ethereum operations and synthesizes them into a single operation that is then stored on the blockchain. In this way, the Optimism protocol can take hundreds of operations and reduce them to just one, increasing the scalability of the network while maintaining security.

Optimism was presented in June 2019 and by October of the same year they would have already launched their testnet. Stil