Using the Tech Report, provide insights on the Google Merchandise Store's user platform$/$device data $($the browser from which user activity originated; the mobile device from which user activity originated; and the device category from which user activity originated$$categories include 'desktop,$\text{'}$ 'mobile,$\text{'}$ and 'tablet'$).$ Based on your analysis, propose strategies for optimizing user experience and acquisition across these platforms and devices in the upcoming year.