In this week’s Week in Charts, Dentsu on leveraging tech clients as partners, video drives podcasting revenues, and Ofcom finds “little change” to children’s harms on social media.
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Children’s Exposure to Harmful Content on the Rise on TikTok, Instagram and Snapchat
Since the children’s online safety duties came into force under the UK’s Online Safety Act last year, there has been “little change” in children’s expsure to harmful content, according to research from Ofcom. The regulator found that 73 percent of UK children encountered harmful content over a four-week period, with the proportion who recall seeing harmful content on TikTok (53 percent), Instagram (34 percent), Snapchat (31 percent) and WhatsApp (25 percent) actually increasing since the new duties took effect. Ofcom’s Chief Executive Dame Melanie Dawes said the watchdog remained “determined to force through further changes, using the full extent of our powers and influence” to ensure tech companies make their platforms safer for children.
YouTube Accounted for Six Percent of Channel 4’s Digital Viewing Last Year
Channel 4 viewing on YouTube reached five billion minutes in 2025, up from 1.5 billion in 2022, according to the UK broadcaster’s annual report. While viewing minutes on Facebook and Snapchat have been in decline, YouTube now accounts for six percent of all digital viewing of Channel 4 content, reflecting the broadcaster’s strategy of releasing full episodes on the Google-owned video service. Revenues from YouTube also nearly doubled last year, with Channel 4 noting that “an ongoing global partnership with YouTube enables Channel 4’s Social Sales team to sell advertising inventory directly against a significant share of Channel 4’s UK views.”
Over 20 Percent of Brands and Agencies Lag on Automation in Campaign Optimisation
While almost half of brands and agencies report high levels of automation in their campaign optimisation, more than 20 percent say their optimisation is only minimally automated or not automated at all, according to Affinity Solutions. “The good news is that 45 percent of marketers are operating at a high level of automation,” the company said in the report. “The challenge is the significant tail (more than a fifth of the industry) that remains largely manual, and the broad middle group whose partial automation masks substantial gaps in coverage and data quality.”
Incrementality Testing and MMM Among Most-Trusted Measurement Solutions
Incrementality testing via independent third-party and open-source solutions was cited as the most-trusted measurement solution among US marketers, according to a new survey from marketing intellignce business Haus. Incrementality testing topped the poll with 60 percent of respondents trusting the tools, followed by media mix modeling at 40 percent, while first-/last-touch attribution and post-purchase surveys came in lower at 31 and 29 percent respectively.
The Week in Stocks
Agencies
Shares in S4 Capital rallied over the past week, following their 11 percent fall the week before.
TV
Paramount Skydance’s share price jumped on the news that the company is aiming to finalise its merger with Warner Bros. Discovery (WBD) as soon as July.
Publishers
Shares in Future recovered on Wednesday after their five percent decline the previous week.
Ad Tech
Criteo’s stock price is trending upwards after hitting a 52-week low earlier this month, when the ad tech firm lowered its full-year outlook for 2026.
Tech
Apple stock is currently trading at an all-time high, riding the company’s strong revenue guidance in its latest earnings report.
