Gary Head, former general manager of omnichannel at Mars United Commerce ANZ (Publicis Groupe) and company secretary of industry body Shop! ANZ created CART Index: an AI platform built specifically to test and optimise retail media and shopper creative before it hits the market. In that role, he led award-winning omnichannel campaigns and spearheaded the global rebrand to Mars United Commerce ahead of its Publicis Groupe acquisition in 2024. CART Index helps fix that.”The platform evaluates creative across four shopper-centric dimensions: attention attraction, message clarity, brand recognition, and trigger power. The CART Index said it delivers evidence-based feedback in minutes unlike traditional pre-testing methods, which are slow and expensive.