Grocery store discount cards are loyalty cards offered by supermarkets that provide customers with special discounts on their purchases. When shoppers use these cards at checkout, they can save money on various items, including groceries, household products, and sometimes even fuel. These cards are often free to obtain and can be used by anyone who shops at the store. In addition to discounts, grocery store discount cards may offer rewards points that can be redeemed for future savings or special promotions. Customers can sign up for these cards online or in-store, and they typically require basic personal information, such as a name and phone number.