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Advertisers are keeping ChatGPT ad budgets tiny because OpenAI's conversion tracking is slow, patchy and short on demographic data, leaving brands unwilling to scale beyond test spend.

Taco Bell and Duolingo are rebranding National Taco Day as "Global Taco Day," launching a limited Duo Habanero sauce whose packets double as nine-language mini language lessons.

American Express is turning Harry Styles fandom into a membership benefit, bundling tour pop-ups, exclusive merch, presale access and a global sweepstakes to win younger cardholders.

WPP's Jon Cook will leave in March 2027 after 30 years, handing the global CEO role at VML to long-time colleague Eric Campbell.

Nine quick marketing wins from Merx Marketing you can action this quarter — small, practical moves that drive real growth without a big project or budget.

Independent media agency Bountiful Cow has won the brand media account for fresh dog food company Butternut Box after a competitive in-house pitch, taking on above-the-line media strategy, planning and buying.

People's Pension has launched 'Famously Fair', its first-ever national TV campaign, casting comedian Joe Wilkinson as a 'Fairy Godmother' in a rigged 'unfairground' — created with agency Bountiful Cow.

S4 Capital's Monks has made management changes at Monks Germany and across its European operations, following earlier turbulence at the German unit.

Agency thjnk has successfully defended the account of Hanover utility Enercity in a competitive pitch, remaining its lead creative agency.

Burger King Germany has ended its social-media partnership with Berlin agency Charles & Charlotte after about 18 months.

Car-rental brand Sixt and Jung von Matt produced a same-day reactive ad mocking a running German political scandal — a textbook newsjacking play.

Beauty retailer Douglas is retendering its media business across all 22 of its European markets, just a year after consolidating DACH spend with Carat.

L'Oréal has concluded its DACH media review and awarded its roughly €350m business to Omnicom Media Group, ending Wavemaker's tenure.

Health insurer AOK has launched a national umbrella-brand campaign by Scholz & Friends personifying everyday worries as unwelcome bedroom roommates.

France's media research body IREP has released the second edition of its advertising-effectiveness guide, focused on measurement and identifying causal effects.

Independent French agency Wild Buzz has won a three-way pitch to handle the French launch of Jean Paul Gaultier's new 'La Favorite' fragrance, anchored by a Paris pop-up.

French packaging eco-organisation Citeo has launched 'La vie après le tri', a 360° campaign via agency Belle showing what actually happens to packaging after it is sorted.

Yoplait's Perle de Lait yoghurt brand has unveiled a new sensorial campaign by agency Raymonde, treating a single spoonful as a mood-shifting moment.

French trading desk Gamned has shared early results from running ChatGPT advertising campaigns in France, reporting unusually low entry pricing.

Two senior BBDO New York leaders are departing, with FCB hiring both — a clean signal of senior-talent churn among the big US creative shops.