How do meta-transactions improve user onboarding on Ethereum?

Transaction costs (gas) on Ethereum are a major impediment to mainstream adoption of Dapps. Meta-transactions are a way to bypass the issue. They are already used today in successful DeFi apps such as Argent.xyz. We will introduce the concept and then we will go through every step of their implementation, from the smart contract to the creation of off-chain messages. Finally, we will discuss how we've used meta-transactions with Rockside.io.