Search Engine Land is a must read hub for news and information about search engine marketing, optimization and how search engines such as Google, Yahoo and Microsoft's Bing work for searchers. Be sure to visit to keep up on everything related to search and search marketing. Search Engine Land is published by Third Door Media, which is also the parent company that produces the Search Marketing Expo (SMX) and MarTech Conference series, and Digital Marketing Depot, our research center for digital marketers.