How information stored in punch Cards?

Information on punch cards is stored using a series of holes punched in specific locations on the card. Each hole represents a binary value, with a hole typically indicating a "1" and the absence of a hole representing a "0." The arrangement of these holes corresponds to data in a predefined format, allowing machines to read and process the information when the card is fed through a card reader. This method was widely used in early computing for data storage and processing.