The Internet: How Search Works

A search box looks instant, but the work happens long before you type. John, who led search and machine learning at Google, and Akshaya from Microsoft Bing explain how programs called spiders crawl the web ahead of time to build an index, and what decides which results come first. It also touches on how search engines fight spam and use your location, all in about five minutes. Handy context for any conversation about search features, ranking or why a page "isn't indexed yet".