Whenever you open a trade, you will always see a small loss which is because the broker deducts their spread. Break Even (BE) is when your trade becomes profitable enough to pay off the spread, exit the negative balance and your profit/loss becomes 0.00.
After Break even you can choose to close the trade and your account balance will remain the same.
Many traders aim to exit their trades at Break even when they see that the odds are against them or when they can no longer continue etc.
It is better for your trade to end in break even than for you to record a loss.