Topshop is a major British fashion retailer with over 300 stores across the UK and internationally. It began as a small department in Peter Robinson's store in 1964 and has since grown into a global brand synonymous with affordable and on-trend fashion. Topshop partners with various designers and celebrities and is known for exclusive collections from figures like Kate Moss. While facing some challenges like copyright issues, Topshop has been largely successful in attracting customers of all ages through innovative marketing strategies and competitive prices.