Mobile device sales for the 2015 holiday season hit $12.65 billion, a 58% increase from $7.98 billion in mobile sales in 2014. During major shopping events, the majority of sales came from mobile devices - 74% of sales at Alibaba on Singles Day and 60% of traffic on Target.com during the holidays came from mobile. Nearly 70% of Amazon customers shopped using mobile devices. Surveys found that millennials and Gen Xers were more likely to research and purchase using mobile shopping apps than older generations. Features like easy cart editing, fast performance, and view switching were important for mobile apps across all age groups.