Native advertising is growing sharply as a result of the shift in digital audiences and consumption to mobile devices, where limited screen size and usage modes favour formats that mirror the form or function of the platform and media. Publishers and advertisers are moving rapidly to exploit the opportunity. Publishers see unique native formats as a way to distinguish their ad offering in a highly commoditised internet advertising space, while advertisers and their agencies hope to get more bang for their buck. Between 2015 and 2020, we expect native advertising spend across Western Europe to grow by 156% to €13 billion, representing 52% of internet display and three quarters of net growth in internet display.