He was the Chief Content Officer at Third Door Media , and co-founded Search Engine Land , an industry publication that covers news and information about search engines , and search marketing , SEO and SEM topics .
Danny Sullivan is an American technologist , journalist , and entrepreneur .
Danny Sullivan was the technologist     at Third Door Media , and co-founded Search Engine Land , an industry publication that covers news and information about search engines , and search marketing , SEO and SEM topics .
Danny Sullivan is an American technologist , journalist , and entrepreneur .