Dancing tango is like having a conversation with someone. You tell her how you intend to move. She tells you how she agrees to follow. You adapt your lead to her follow. She accommodates her follow to your lead. The silent exchanges of information - intentions, feelings, interpretations, feedback and adjustments, etc., make it possible for the two to dance together as one unified body. Good dancing is the result of good communication.
Here is how the Argentinians dance tango in their milongas.