What is the gas fee in Bitget?

Could you please elaborate on what the gas fee in Bitget refers to? I understand that gas fees are often associated with cryptocurrency transactions, but I'm not familiar with how they are specifically applied or calculated on the Bitget platform. Are these fees standard across all transactions, or do they vary depending on the type of transaction or the amount being transferred? Also, is there a way to minimize or avoid these fees when using Bitget? Thank you for your assistance in clarifying this matter.