Amazon operates Amazon Web Services, or AWS, and is one of the world’s largest public companies by market capitalization.
AWS launched in 2006 and provides computing power, storage, databases, networking, and other services over the internet. It became a major business for Amazon and helped popularize cloud infrastructure as an alternative to companies buying and maintaining all their own servers.
Amazon began primarily as an online bookstore, but it expanded into a broad marketplace, logistics, digital media, devices, advertising, and cloud computing. The combination of these businesses made Amazon much more than a traditional retailer and helped support its high public-market valuation.
Microsoft Azure and Google Cloud are major competitors, so they are common wrong answers. AWS is specifically Amazon’s cloud division. Amazon’s market capitalization changes continuously as its publicly traded share price changes.