An online shopping cart is a digital tool that allows customers to select and store items they wish to purchase while browsing an e-commerce website. It functions similarly to a physical shopping cart, enabling users to add, remove, or modify items before finalizing their order. Once customers are ready to check out, the shopping cart calculates the total cost, including taxes and shipping fees. It also securely stores customer information, such as shipping addresses and payment details, to streamline the purchasing process. Popular e-commerce platforms like Shopify and WooCommerce offer integrated shopping cart solutions for online retailers.