The biggest online marketplaces sell millions of SKUs from thousands of brands. By 2027, they’ll play a role in 59% of purchasing journeys, making them a great source of data to uncover trending products and dropshipping ideas. Start by looking at “top product” pages on Amazon, Etsy, and Walmart. Pay close attention to top products in any given category, or those with a “selling fast” icon. Continue your search on wholesale marketplaces like AliExpress, Alibaba, and SaleHoo. Because most of these marketplaces double up as a dropshipping website, top products are also available for dropshipping (versus something you find on eBay that may not be dropshipable).