More threads by djbaxter


Jun 28, 2012
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Announcing the Bing Mobile Friendliness Test Tool
Bing Webmaster Blog
November 12, 2015

In our earlier post about our approach to mobile-friendly search, we talked about some of the factors that our algorithm takes into account to determine whether a page is considered ?mobile friendly? such as readability and navigation. Today, we are happy to announce the general availability of the Bing Mobile Friendliness Test Tool and also would like to dive a little deeper into the more specific factors that determine mobile friendliness and provide more understanding how these factors impact your site. You can find the Bing Mobile Friendliness Test Tool in Bing Webmaster Tools under Tools & Diagnostics or navigate to it directly using this link.

How is a Page Determined to be Mobile Friendly?
When evaluating a webpage for mobile friendliness, the following key factors are considered:

  • Viewport and Zoom control configuration
  • Width of page content
  • Readability of text on the page
  • Spacing of links and other elements on the page
  • Use of incompatible plug-ins

The Mobile Friendliness Test tool runs checks on all of these key factors and additionally checks for and reports on resources that are needed to analyze the page fully but that we weren?t able to crawl due to robots.txt constraints. This way rendering issues (as seen in the page preview) can be fixed by webmasters by updating robots.txt in such a way that Bing can accurately determine the mobile-friendliness of the sites.

When you submit the URL of a page to be analyzed to the Mobile Friendliness Test tool, our Bing Mobile crawler fetches and renders the page, extracting important features that are used by the tool to determine how the page performs against each of the above factors. The outcomes are then aggregated into a consolidated mobile-friendliness verdict for the page.


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