Why is Shein so popular?

Could you elaborate on the reasons behind Shein's immense popularity? What specific factors have contributed to its rapid rise in the fashion industry? Is it the affordability of their products, the variety of styles they offer, or perhaps their effective marketing strategies that have captured the hearts of so many consumers? Additionally, how does Shein manage to stay ahead of the curve in terms of trends, and what sets it apart from its competitors in the fast fashion market?