You are expected to define (AO1) balance of payments, credit/debit items, and account surpluses/deficits (SL+HL)
The balance of payments of a country is the difference between all money flowing into the economy, and all money flowing out of the economy, in a given time period.
Credit items are payments received from foreign consumers, firms, or governments
Debit items are payments given to foreign consumers, firms, or governments
An account has a surplus when its value of credit items is higher than the value of its debit items, in a given time period.
An account has a deficit when its value of credit items is lower than the value of its debit items, in a given time period.