Does a high mobile share mean mobile should be optimised first?

Share alone does not set priority. Priority comes from the volume of a device multiplied by the gap between its outcome and the best device's; mobile at seventy percent of traffic with half the desktop rate ranks far above mobile at the same share performing on par with desktop.

Desktop vs Mobile

Beginner

Updated Jul 11, 2026 Shahin editorial 2 min read

PronunciationEN/ˈdɛsktɑːp ˈvɜːrsəs ˈmoʊbəl/

Desktop vs mobile is the comparison that splits traffic and outcomes across device classes to show which environment's experience has fallen behind the others.

The comparison rests on the device type dimension, which is guessed from the User-Agent string, so mobile means a device that declared itself a phone, not a narrow window; a laptop with a small window and a phone in desktop mode both break that assumption. Comparing absolute counts in this table is almost always useless, because device shares are unequal to begin with and only rates carry meaning. The main trap is Simpson's paradox: mobile can convert worse overall while matching desktop inside every acquisition channel, simply because mobile traffic leans towards top-of-funnel channels such as social networks. The sound method is to compare at a fixed level, holding one channel and one page type constant before placing the two devices side by side.

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