E-commerce companies are businesses that sell products or services online. They operate through websites or mobile apps, allowing customers to browse, select, and purchase items from the comfort of their homes. Popular examples of e-commerce companies include Amazon, eBay, and Alibaba. These companies often provide various payment options, such as credit cards and digital wallets, to facilitate transactions. E-commerce has grown significantly due to the convenience it offers, enabling consumers to shop anytime and anywhere. Additionally, many e-commerce platforms offer features like customer reviews and personalized recommendations to enhance the shopping experience.