1) Mobile devices are taking a larger share of consumer usage and advertiser budgets across search, display, and social media. While clicks and spending have shifted significantly to mobile, conversion rates remain higher on desktop devices.
2) Advertisers have increased mobile spending but still struggle with mobile attribution and optimization. Over 50% of clicks now occur on mobile, but the share of conversions attributed to mobile devices generally lags behind mobile spending.
3) Performance varies across channels and devices. Search has the highest click-through rates overall, while conversion rates are higher on desktop than mobile. Cost-per-click also tends to be lower for mobile devices where conversion rates are lower.