We estimate that UK online ad spend grew by 12.3% this year, with growth concentrated almost exclusively in mobile search and social in-feed advertising (particularly video), and mostly incremental to overall ad spend

Even after payments to publishers and distributors, Google and Facebook captured 80% of all net new spend in the market, and 96% of it flowed through their platforms

Despite improving standardisation and disclosure, the outstanding issues around measurement, the ad-tech supply chain, and particularly the obscure and growing Google/Facebook/Amazon segment, lead us to identify a large portion of digital advertising as a “grey market”: difficult to get a handle on, with uncertain beneficiaries and slippery definitions

Digital advertising in the UK has been a phenomenal success story, but a concentrated one, such that many online media companies have not found a sustainable model

User payments are growing, but are currently focused on large, expensive bundles: Spotify, Netflix, the New York Times. This implements a hard division between free and paid and limits the potential audience

Micropayments and microsubscriptions are alternative models which content owners in certain media can use to address more types of demand. Multiple obstacles remain but for many companies the need to experiment has become critical

Accelerating print advertising declines in 2016 are placing pressure on local newspaper publishers to deliver faster online growth

However, digital growth is being supported yet compressed by Google and Facebook; we estimate SME expenditure on Google is roughly 2x the local press, and we expect SME spend with Facebook to match local newspaper advertising revenues in two to three years

Publishers need to grow consumer registrations and subscriptions, digital display and also digital marketing services, in partnerships with the tech giants – but first they have to convince consumers they have relevant use-cases that global platforms cannot replicate

Cross-device identity profiles are used to stitch together fragmenting online ad audiences, but also to enable new links between advertising and marketing, across European markets

This moves value from media itself to understanding each consumer and how they access content and services on proliferating connected devices

By 2020 we predict that 58% of all UK online ad buys by value will make use of high-quality audience IDs, led by the largest advertising platforms but limited by privacy regulation and cost

Media reports of ads by top brands appearing next to extremist content on YouTube have surprised advertisers and led to a barrage of criticism from other media companies, agencies and the UK government

Despite several advertisers pausing spend, the revenue impact for Google is likely to be small in the short term – but the debate is a symptom of ongoing tension between “frenemies”: large agencies and Google & Facebook 

By urging Google alone to educate display advertisers and filter campaigns, agencies risk ceding more of their client relationship to the advertising giant, while calls for the platform to make all editorial judgements on political content are inappropriate

Amazon’s marketing services bring in a growing stream of direct, high-margin revenue, but their main role is still in supporting vendor partnerships

Amazon uses customer profile data to profit from its own media and that of others, illustrating the value of a direct customer relationship in online advertising

In the future, Amazon’s moves into video content and voice interfaces are likely to significantly expand ad inventory, but maintaining the trust of shoppers is not straightforward