This year marked the second annual IABUK Digital Upfronts. As well as Facebook, Google/YouTube, Aol, Yahoo!, Twitter, BuzzFeed, Vice and others, several traditional media companies – Sky, The Guardian and Global Radio – participated, reflecting the rising importance of digital media and digital media buyers to their businesses

Many of the pitches were informed by the key shifts in online content: it is increasingly cross platform, driven by mobile devices and focused on video programming, and these formed the main themes of the event

A key piece of context is the rise of social media and the shift to programmatic buying, which continue to driven down pricing for all but the most valuable inventory – audience scale, high value audiences and premium content have never been more essential

The latest numbers for Q1 2015 show strong device and internet user growth, with more of the population online than ever before, including more than 90% of under-55s. Growth amongst older groups, however, has slowed to a crawl

Participation in online activities is up across the board, but digital media data shows spend on ebooks and digital music struggling, with the latter being heavily impacted by the rise of unlimited streaming models such as Spotify

The story of mobile's surge continues, with almost a half of e-commerce transactions and a third of search and display ad spend now going to mobile. Most of these mobile devices are Android, but iPhone seems to have gained long term share with its larger phones. Google services, however, have cross-platform reach