An online supermarket is a digital platform that allows customers to purchase groceries and household items over the internet. Users can browse a wide range of products, including fresh produce, dairy, and pantry staples, and add them to their virtual shopping cart. Payment is typically made online, and items are either delivered to the customer's home or made available for pickup. These platforms often provide features like product reviews, price comparisons, and special discounts. Popular examples of online supermarkets include Amazon Fresh, Walmart Grocery, and Instacart. They aim to offer convenience and save time for busy shoppers.