Amazon Prime Day drives $7.2B in spending on first day of sales event

Consumers collectively spent $7.2 billion online during the first day of Amazon's two-day shopping bonanza. 

That figure is up 11.7% year over year. It also marked the biggest e-commerce day so far this year, underscoring the significant impact Prime Day has on online retail sales.

Tuesday also marked the biggest mobile shopping day so far this year, accounting for $3.5 billion in online spending across retailers, according to Adobe data. 

Adobe analyzed direct consumer transactions...