On the Ethereum blockchain, gas is the transaction fee for the miner to pick your transaction and record on the blockchain. The gas price will fluctuate and will make a transaction with contract expensive due to the large bits of data. This guide will show you show to lower the gas fee on Metamask.
Now back to the detail page you should see the Gas Price is lowered. When the gas price is too high you can choose to stake in a different time to cut the cost of transaction.