“On April 21, 2016, Google changed its algorithm to give preference to mobile-friendly sites on searches performed on mobile devices. This means that sites that aren’t designated as “mobile-friendly” by Google sink to the bottom in mobile search results while sites that do pass the test appear toward the top.”

The article advises libraries on what to do to make their websites more mobile-friendly.

Of interest – “WordPress, for example, offers WPtouch, a plug-in that automatically enables a mobile theme for visitors reaching you by way of their phones”