Mobile is growing at a very fast pace that it is no longer the future but the present, as Bing puts it. Search engines are now helping webmasters make their sites mobile friendly. For example, Google has recently launched a new mobile-friendly testing tool which makes webmasters know if their website is good for mobile or not. Bing has began working hard too, and its ready to acknowledge all the work you’ve been doing to get crawled, indexed, selected, and ranked – from the mobile perspective.
Bing is consistently checking websites for “mobile compatibility” – an important aspect of how it views your site when serving up results on Bing-powered search across mobile devices.
When it comes to mobile, all the original recommendations still apply. A recommended approach is to avoid separate .m URLs for mobile to prevent bifurcation of your rank instead, move to responsive design that adapts to the device and benefit from maximum SEO power instilled in a single URL. This continues to be the way forward for future-looking sites. Many sites still use different URLs for their mobile phone or smart phone customers or have varying levels of user experiences depending on the type of device. In order to understand how content renders on various devices, Bing has started to probe websites with a number of new crawlers with.
Mobile User Agents
In order to understand how your site behaves specifically for mobile users, Bing has added a couple of new crawler variants which identify themselves with a user agent that mimics some of the most common mobile device types. In general, these crawlers use a user agent string that follow the following format.
Mozilla/5.0 + (Mobile Device) + Mobile Engine + Mobile Browser + bingbot/BingPreview/[version]
Below are some user agent strings that follow this format;
Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53 BingPreview/1.0b
Mozilla/5.0 (Windows Phone 8.1; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; NOKIA; Lumia 530) like Gecko BingPreview/1.0b
Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)
Mozilla/5.0 (Windows Phone 8.1; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; NOKIA; Lumia 530) like Gecko (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)
The user agent strings containing “BingPreview” refer to crawlers that are capable of “rendering” the page, just like a user’s browser would. It is therefore important that you allow Bing crawlers to not only find the core content of the URLs themselves, but that you also allow them access to the necessary resources needed to load each page, that is, including any CSS, script, and image files.