A renowned British online store of clothing and cosmetics, ASOS plc was founded in 2000. The company, which has its headquarters in London, England, primarily sells goods to young people and provides a variety of apparel, footwear, accessories, and cosmetic products. With its line of apparel and accessories as well as more than 850 other brands, ASOS is a worldwide retailer that ships to all 196 countries from fulfilment facilities in the United Kingdom, the United States, and Europe.

Initially branded as AsSeenOnScreen, the business offered knockoffs of attire from movies and television shows. To meet the many fashion needs of its customers, ASOS has evolved and widened its product offering over time. With other offices in Berlin and Birmingham, the company's main office is at Greater London House in Camden Town. Their primary fulfilment facility, where they have a sizable workforce, is in Barnsley, South Yorkshire.

ASOS is a public company listed on the London Stock Exchange. It has advanced significantly in the fashion sector, acquiring well-known labels including Topshop, Topman, and Miss Selfridge, among others. The business has also taken the initiative in developing its digital marketing methods, using websites like Instagram and YouTube to interact with customers and influence their fashion preferences. ASOS keeps expanding and innovating, securing its place as a major player in the online fashion retail sector.