Gas is used any time you send a transaction on Ethereum. High gas amounts typically result in fast transactions on Ethereum; while low gas amounts typically result in slow transactions. To determine what is an appropriate amount of gas, we recommend using https://ethgasstation.info.
Once you’re on Eth Gas Station, look at the bottom right-hand corner at the “Recommended Gas Prices.”
The first column “Speed” shows how long a typical transaction will take. The second column “Gas Price (gwei)” shows the recommended amount of gas that is needed for the transaction to be processed at the speeds shown in the first column.
We recommend submitting transactions above the “Standard (<5m)” price to ensure that your transaction is accepted by the Ethereum network.