In bookkeeping and accounting, a credit could refer to the entry on the right side of a T-account. A credit could also be a verb that means the act of recording an amount on the right side of a T-account.
A credit entry in an asset account will reduce the account's usual debit entry. A credit entry in a revenue, liability, or owner's equity account will increase the usual credit balance.
A credit could also mean your bank has increased your bank account balance. Your bank account is a liability for your bank and when your bank account increases, your bank has a larger obligation to you.