This is first and foremost a warning card. Its main purpose is letting us know that something is not as it seems to be, or that we are making false assumptions about a person or situation.
Though in most decks a woman is the protagonist of this card, when it refers to a person it could be either a man or woman and the surrounding cards will give us extra information.
Anywise, the appearance of this card is calling us to be careful , examine our choices or be cautious with some people.
The position of the card in relation with the querent card is also important. The closer it is,the sooner events will happen.