The world's most popular and profitable marketplaces prioritize advanced search and browse scenarios, such as dynamic faceting, content carousels, autocomplete drop-downs, and federated search. These features enhance user experience by providing personalized suggestions, recent searches, and relevant results. Effective implementations can be seen in marketplaces like Amazon, Etsy, Newegg, Houzz, Videdressing, Walmart, and ManoMano, which offer unified omnichannel experiences across web, mobile web, and mobile applications. By implementing these best practices, businesses can improve user engagement, increase conversion rates, and drive revenue growth.