The document discusses how to increase link popularity in order to improve search engine rankings. It explains that search engines give higher rankings to websites that have links from other high-quality, relevant sites. It provides tips for getting listed on directories, finding sites to link to that are related and non-competitive, and politely contacting them to request a reciprocal link. Regularly checking search engine rankings and linked sites is recommended to monitor progress in improving link popularity over time through ongoing linking efforts.