It may give a feeling of slowing, or even stopping. So if you're leading, you may choose to slow or stop for a few beats of music. You shouldn't have any trouble doing this, since you often slow or stop when you are simply walking. You will probably find that it feels more natural to slow down on side steps rather than forward or backward steps, and to stop when your feet are together after a Chase or a Tango Close. But try other possibilities as well.
Pauses are an important part of the Argentine tango.
Tango is not just an athletic but also an emotional and social activity. Tango doesn't have to be somber. Twist your upper body slightly to your left using your spine as an axis, twist it to the right slightly, then end by returning to the straight-ahead position. You can do a Shake slow or fast, gently or energetically. You can do more than one Shake in a row.