E-commerce are all sales transactions concluded online (e-sales) or purchases made online (e-purchases) of a good or service via computer networks, using methods specifically designed for receiving and placing orders (i.e., no written email or fax messages). Orders are placed directly via the company website, EDI, or a platform. For example, online purchases of clothing or books, orders for delivery of groceries or meals, booking of tickets for events, or booking of airline tickets or accommodations.