If you are on Ethereum mainnet you can check Ethereum calculator to estimate today's gas price.
Please note the gas price fluctuate daily always refer to the Ethereum gas station to see the current gas prices.
The Ethereum network requires gas to execute transactions. When you send tokens, interact with a contract, send ETH, or do anything else on the blockchain, you must pay for that computation. That payment is calculated in gas, and gas is always paid in ETH.
You are paying for the computation, regardless of whether if your transaction succeeds or fails. Even if it fails, miners must validate and execute your transaction, which takes computational power. You must pay for that computation, just like you would pay for a successful transaction.
Please note this is not a fee that Metamask receives so we cannot refund it. This fee is paid to miners for mining the transaction, validating it into a block, and securing the blockchain.