This document outlines 10 ecommerce secrets from successful companies to increase sales. It discusses strategies used by Nordstrom, Polyvore, Nike, eBay, Zappos, Amazon, Alibaba, Tesco, Ryanair and Groupon. Some of the key secrets discussed are providing clothing fit information, enabling custom product design, optimizing product search and filtering, offering subscriptions, incorporating upsells, and focusing on local pickup options. The document advocates studying the strategies used by top companies, selecting the most beneficial approaches, and implementing them to boost online revenue.