This forecast details mobile and tablet commerce sales, sales growth, and online market share from 2015 to 2020 for retail and travel across the UK, Germany, France, Italy, Spain, the Netherlands, and Sweden, as well as the smartphone share of mobile and tablet commerce. Buying behaviors on tablets and smartphones differ. This forecast helps retailers understand which devices are most commonly used to transact online across desktops/laptops, smartphones, and tablets to help guide their investment decisions both today and in the future.