I've been meaning to write about this for a while, and finally had time to put it together today.
Layer 2 networks are scaling networks built on top of Ethereum mainnet. They process transactions off-chain, then write the results back to mainnet.
Layer 2 saves money because it batches a large number of transactions together and writes them back to mainnet collectively, allowing the mainnet fees to be shared among those transactions.
$ARB and $OP are the governance tokens of Arbitrum and Optimism, respectively.
What do you think? Feel free to share your thoughts in the comments.

#ARB