Answer
Conversion rate optimization (CRO) handles mobile and desktop differences by tailoring experiences to each device's context, screen size, and user behavior. Mobile users often have shorter attention spans and slower connections, so CRO focuses on speed, thumb-friendly design, and simplified forms.
Teams run separate A/B tests for each device type because changes that work on desktop may fail on mobile. For example, a large image carousel may engage desktop users but slow down mobile load times. Analytics are segmented by device to identify unique drop-off points. Responsive design ensures consistency, but CRO optimizes interaction patterns specific to touchscreens versus mice.