In a semiconductor (like the silicon in your phone), electricity flows via electrons. However, when an electron leaves its position in a crystal lattice, it leaves behind a "hole." Carries a negative charge. The "Hole": Acts as a positive charge carrier.
Given the broad potential interpretations of "poles and holes," could you provide more context or specify the field or subject you're interested in? This would help in offering a more targeted and helpful response. poles and holes