Polygon (Matic)

Network Details

The first thing you need to do is add the network to your Metamask: Network Name: Matic Network New RPC Url: https://rpc-mainnet.matic.network ChainID: 137 Symbol: MATIC Block Explorer URL: https://explorer-mainnet.maticvigil.com

Once you have the proper network you will need native MATIC in your wallet to transact. Treat MATIC the way you would treat ETH on Ethereum. This is what pays the (almost non-existent) gas fees.