Guidelines for successful indexing

1. Technical recommendations for your site
   
   
2. Content guidelines for your site
   
   
3. Techniques that might prevent your site from appearing in Bing results
   
   

1. Technical recommendations for your site
   
   Use the following techniques to ensure your site is technically optimized for the Bing web crawler:
   
   
   • Use only well-formed, HTML code in your pages. Make sure that all paired tags are closed, and that all links open the correct page. For information on validating your HTML code, see W3C Markup Validation Service or use a comparable tool.
     
     
   • If your site contains broken links, Bing might not be able to index your site effectively, thus preventing people from reaching all of your pages.
     
     
   • If you move a page, set up the page's original URL to redirect people to the new page. Indicate whether the move is permanent or temporary, and use the appropriate redirect (use a 301 redirect for a permanent change or a 302 redirect for a temporary change. For more information, see our guide about Managing duplicate content and redirects.
     
     
   • Use a robots.txt file or <meta> tags to control which pages and other content on your site are not available to be indexed by Bing and other search engines. You can use the robots.txt file to prevent web crawlers from crawling specific files and directories. For more information about the robots.txt file and the Robots Exclusion Protocol (REP) standard, see our guide about how to How to create a robots.txt file
     
     
   • Make sure your robots.txt file is configured to allow the Bing web crawler to crawl your site and isn't on your list of web crawlers that are prohibited from indexing your site.
     
     
   • Keep your URLs simple and static. URLs that are complicated or that change frequently are difficult to index as link destinations. For example, the URL www.example.com/mypage is easier for Bing to crawl and for people to type than a long URL with multiple variables. Also, a URL that doesn't change or use multiple variables is easy for people to remember and bookmark. That makes your page a more likely link destination from other sites.
     
     
   • Watch for malicious software (malware). If one or more pages on your site either directly contains or links out to external pages containing malware or malicious content , such as a maliciously corrupted image or document file, or a harmful ActiveX control or JavaScript, those pages will be disabled and highlighted as malware in the Bing search engine results pages (SERPs). See our guide about How to clean up your site from a malware infection to learn how to find these detected malware issues on your site.
     
     
   • Register your site with Bing Webmaster Tools. One of the key benefits to registering a site is that the site’s default page will always be indexed.
     
     
   • Another important benefit of registering your site with Bing Webmaster Tools is that you can use the Submit URLs tool to request that Bing index specific pages on your site that are not in the index. As long as the pages do not use web spam techniques or contain malware, URLs submitted to Bing via this tool will be added to the index. Note that this tool limits the number of URL submissions to a maximum of 10 per day and 50 per month.
     
     
   • Add a Sitemap.xml file to your site, which helps Bing to find all of your important pages. Links that are embedded in menus, list boxes, and similar elements aren't accessible to web crawlers unless they appear in your Sitemap. For information on creating Sitemaps, see our guide About sitemaps.
     
     
   • Keep your site hierarchy fairly flat. That is, each page should only be from one to three clicks away from the default page.
     
     
2. Content guidelines for your site
   
   A great way to attract people to your site and to keep them there is to ensure that you have filled your pages with valuable content. The following guidelines can help you create a more effective and popular page by ensuring your content is both relevant and of value to your audience.
   
   
   • In the visible page text, include keywords users might choose as search query terms to find the information on your site.
     
     
   • Create unique, keyword-rich text for the <title> and <meta> description attribute tags for each page.
     
     
   • Limit all pages to a reasonable size. Bing recommends covering one topic per page. An HTML page with no images should be under 150 KB.
     
     
   • Make sure that each page is accessible by at least one static text link.
     
     
   • Don't put text you want indexed within images. For example, if you want your company name or address to be indexed, make sure it isn't displayed only inside an image of your company logo.
     
     
3. Techniques that might prevent your site from appearing in Bing results
   
   The following techniques aren't appropriate in terms of attempting to gain higher ranking with the Bing index. Use of these techniques, commonly identified as web spam, might actually adversely affect how thoroughly your site is indexed within Bing, and might even cause your site to be removed from the index.
   
   
   • Attempting to increase a page's keyword density by adding a high volume of irrelevant words. This includes stuffing <img> alt attribute tags that users are unlikely to view.
     
     
   • Using hidden text or links. Only use text and links that are visible to users.
     
     
   • Using techniques, such as link farms, to artificially increase the number of links to your page.
     
     

More helpful information can be found here: W3C Markup Validation Service