Google Tests Icon for Smartphone-Optimized Results

A Google experiment shows a special icon next to smartphone-optimized search results. Obviously, the icon is only displayed when searching from smartphones.

Back in 2012, Google ran a similar experiment, but it never became a regular feature.

Google has a few articles about building smartphone-optimized sites. Google supports three different configurations: responsive design (same code, same URL - Google's recommended configuration), dynamic serving (different code, same URL) and separate mobile sites (different code, different URL).

{ Thanks, Herin Maru. }