The desktop version of a site might be difficult to view and use on a mobile device. The version that's not mobile-friendly requires the user to pinch or zoom in order to read the content. Users find this a frustrating experience and are likely to abandon the site. Alternatively, the mobile-friendly version is readable and immediately usable.
In the USA, 94% of people with smartphones search for local information on their phones. Interestingly, 77% of mobile searches occur at home or at work, places where desktop computers are likely to be present.
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