This document outlines 13 rules for on-page search engine optimization for ecommerce websites. The rules advise including descriptive content on category and product pages, researching products, keywords, and the website, optimizing for both long-tail and short-tail keywords, using proper heading tags and keyword density, ensuring continuity between page elements, focusing on the consumer experience, analyzing optimization efforts, making adjustments, staying up-to-date on algorithm changes, and considering hiring a professional for SEO.