This area of nonverbal communication depends on the person. Not everyone "talks" with their hands, but integrating hand gestures into communication is a good way to get your point across. Examples to avoid would be pointing at the listener as this feels confrontational or wild hand gestures that take away from what you are saying. Speakers often use hand gestures to help solidify a point they are making, with a subtle downward hand movement for an emphatic point or expansive gestures when making a large point.