Polygon is a “Layer 2” scaling solution (or “sidechain”) that’s emerged to provide faster transactions and lower costs for users. It acts as a speedy parallel blockchain running alongside the main Ethereum blockchain. To use it, you can “bridge” some of your crypto over to Polygon from Ethereum, and then interact with a wide range of popular crypto apps that were once exclusive to the main Ethereum blockchain. The Polygon network offers very low gas fees, high security, and sustainability.