Statement Balance vs Current Balance
The two numbers
The statement balance is the total of charges as of your statement closing date, the figure your bill is based on. The current balance is your up-to-the-minute total, which includes any purchases made since the statement closed, plus any pending items. The current balance is usually higher because spending continues after the cycle ends.
Which to pay
To avoid interest, you only need to pay the statement balance in full by the due date. Doing so keeps you in the grace period, so no interest is charged, even though your current balance may be higher from new purchases. Paying just the minimum, by contrast, means interest on the rest.
When paying the current balance helps
Paying the full current balance is never wrong, and it can help in one case: lowering your reported utilization before the statement closes, which can nudge your score up. But for avoiding interest, the statement balance is the number that matters. See statement date vs due date and reading your statement.