What is Layer 2?

Hey guys, I read about Metis layer 2 in a few places when I initially got into this entire thing with cryptocurrencies, and I had no idea what I was doing, but I was really enthusiastic and interested, so I wanted to learn everything I could about crypto.

And that's how I started asking questions, reading about layers and their roles on various subreddits. So, I'm sure there are rookies like me, but we can all assist each other by sharing information, right?

To understand Layer 2, we should talk first about Layer 1. Layer 1 in blockchain technology refers to the blockchain technology where transfers are settled, BTC and ETH are Layer 1 networks. Scalability is a limiting factor of these Layer 1 blockchains and it simply can't keep up with the demand of transactions on a network in a timely manner. Results are slow transaction speed and as you can guess expensive gas fees, so they found a solution for that by building Layer 2 and making crypto more validly accessible to people and resolving scalability problems by making it faster and cheaper without sacrificing security.

And that's how you get a blockchain accessible, not so complicated as I first thought. Conclusion:
Layer 2 refers to a secondary framework or protocol that is built on top of an existing blockchain system. The main goal of these protocols is to solve the transaction speed and scaling difficulties that are being faced by the major cryptocurrency networks.

Do you find helpful Layer 2 for reducing costs and transaction speed of ETH?