Answer first: TRON Bandwidth covers ordinary transactions and is minted by staking TRX for Bandwidth on Stake 2.0.
See stake for Bandwidth and fee issues when unstaking.
Related reading
Open desk — Ready to act? Open the desk — your wallet signs only when you choose Stake, Unstake, or Withdraw.
Open desk Telegram supportNot financial advice. Non-custodial. Verify on official explorers and wallets.