Martin Sorrell was one of the most vocal critics of Google when he ran WPP. Now, he’s one of the search giant’s most vocal cheerleaders as his S4 Capital venture establishes itself as a business partner to the largest digital companies. Read more below.

• As head of WPP, Sir Martin Sorrell was extremely critical of Google and Facebook. Now, as the head of S4, Sorrell is just as talkative, but less likely to call out the duopoly, choosing instead more nuanced views.
• Publishers and vendors have been going back over their compliance strategies, and more audits are being undertaken to check is all as it should be. Some of these audits are highlighting dodgy practices, like fraudulent consent strings.
• Local TV advertising is being automated, but automating the ad buy is only the first step in the process.
• In-house ad agencies aren't really a choice anymore: Major marketers, from Procter & Gamble to Anheuser-Busch now see in-housing as a necessity.