Use the Bing™ Webmaster tools to improve your site’s SEO, submit your sites and XML-based Sitemaps to Bing, get data on which pages of your site have been indexed, backlinks, inbound links and keyword performance.
Site Explorer allows you to explore all the web pages indexed by Yahoo! Search. View the most popular pages from any site, dive into a comprehensive site map, and find pages that link to that site or any page.
Website owners use the /robots.txt file to give instructions about their site to web robots; this is called The Robots Exclusion Protocol (robots such as GoogleBot crawl through websites with the intention to index them in Google Search Results). If a robot wants to vists a Web site URL, say http://www.example.com/welcome.html, before it does so, it firsts checks for http://www.example.com/robots.txt. In this file, are instructions telling the robots how to respond to the page.
Search engine optimization (SEO) is the process of improving the visibility of a website or a web page in search engines via the “natural” or un-paid (“organic” or “algorithmic”) search results.