Tuesday, November 18, 2014 (Original post date)
Webmaster level: All

Have you ever tapped on a Google Search result on your mobile phone, only to find yourself looking at a page where the text was too small, the links were tiny, and you had to scroll sideways to see all the content? This usually happens when the website has not been optimized to be viewed on a mobile phone.

This can be a frustrating experience for our mobile searchers. Starting today, to make it easier for people to find the information that they’re looking for, we’re adding a “mobile-friendly” label to our mobile search results.

This change will be rolling out globally over the next few weeks. A page is eligible for the “mobile-friendly” label if it meets the following criteria as detected by Googlebot:

Avoids software that is not common on mobile devices, like Flash
Uses text that is readable without zooming
Sizes content to the screen so users don't have to scroll horizontally or zoom
Places links far enough apart so that the correct one can be easily tapped

If you want to make sure that your page meets the mobile-friendly criteria:

Check your pages with the Mobile-Friendly Test
Read our updated documentation on our Webmasters Mobile Guide on how to create and improve your mobile site
See the Mobile usability report in Google Webmaster Tools, which highlights major mobile usability issues across your entire site, not just one page
Check our how-to guide for third-party software like WordPress or Joomla, in order to migrate your website hosted on a CMS (Content Management System) to use a mobile-friendly template

The tools and documentation above are currently available in English. They will be available in additional languages within the next few weeks.

We see these labels as a first step in helping mobile users to have a better mobile web experience. We are also experimenting with using the mobile-friendly criteria as a ranking signal.

Original source: Posted by Ryoichi Imaizumi and Doantam Phan, Google Mobile Search