Delta determines the color of the up arrow and the down arrow for the Direction row. You can see that the option in question must have a negative delta. As indicated, a rising stock price causes losses in this option position (up arrow, red). But a falling stock price causes profits in this option position (down arrow, green). If the colors were reversed, we'd know that the position has a positive delta.
The actual value of delta would tell us the theoretical magnitude of losses that are associated with an upward stock move, as well as the magnitude of theoretical profits associated with a downward stock move.
