Gas fees are the fees that you pay any time you transact with the blockchain network.
In our case when staking, gas fees will be applied by the blockchain network, in the form of BNB, which will be deducted from your MetaMask wallet when making the transaction.
The BNB fee will change according to the congestion on the blockchain at the time of staking and will be calculated approximately. We use the BNB Smart Chain (BSC) where the fees are usually minimal.