By Lisa Harkness, Partner, McKinsey & Company
For decades, marketing has been synonymous with big ideas and bold creativity, think Don Draper’s 1950s boardroom pitches or door-to-door salesmen with a well-rehearsed script. But today’s marketing leaders face a far more complex reality. Consumers are bombarded with digital content, attention spans are shrinking, and every dollar spent is under scrutiny.
The numbers are stark: by 2027 global digital ad spend will ramp up to $870 billion. Yet 40 per cent of these dollars will be wasted – with ads missing the mark or reaching the wrong target. It means CMOs can’t rely on bold creativity alone to drive growth. They are expected to enhance their digital marketing capabilities, take a customer-centric approach, optimise performance and deliver immediate impact. And those who succeed at putting their customers first are seeing real results — growing 28 percent faster than their peers. But how?
Tech and AI-enabled digital marketing
With more buyers than ever starting their purchasing journeys online, companies are reshaping how they serve customers by prioritising digital marketing strategies that are data-led and more personalised. Yet, personalisation isn’t just about knowing a customer’s name, it’s about predicting what they need before they even search for it.
Brands that thrive, understand this, and use AI and real-time data to tailor messaging, products, and experiences to individual customer needs, ensuring customers see highly relevant content across every touchpoint, from social media ads to email recommendations.
One digital marketing agency, ETML, has mastered this by leveraging advanced AI benchmarking tools to analyse insights from hundreds of millions of cross-channel digital ad spend from over a decade of ad experiments. By tapping into their pre-built 100+ analytical frameworks and machine learning models, they can continuously optimise campaigns in real time. This diagnostic-to-insight approach has proven to cut digital ad spend optimisation time by 66 percent and boost campaign impact time by 62 percent.
It is a real shift in digital marketing, moving campaign impact time from six to twelve months to immediate impact. It means some high-performing companies are seeing results immediately, rather than relying on quarterly reviews or manual budget reallocations.
That’s because they’re moving at the speed of digital. They’re accelerating personalised customer engagements enabled by AI and automation and delivering cohesive messaging across all channels. All to reduce ad wastage, optimise campaign performance and drive growth.
Rewiring marketing teams
Yet even with the right technology, many marketing teams struggle to get things done at scale. Outdated legacy structures make silos worse, slowing down decision-making and affecting collaboration across teams.
We’re seeing leading companies rethink this approach. For example, instead of keeping marketing as a standalone function, high-growth organisations are bringing together communications, analytics, legal, R&D, and supply chain under one umbrella. The result is a marketing model directly tied to commercial outcomes, where success isn’t measured by impressions or clicks but by revenue growth and product expansion.
Changes like these shows how modern marketing teams can break down silos, embrace automation, and integrate AI-driven insightsinto their operating models to stay competitive, ensuring that every single dollar spent delivers business value, not just brand lift. It means brands can pivot at speed when campaigns aren’t landing, or when customers aren’t responding on specific channels or at specific times. It is how they cut ad wastage, with real-time analytics into campaign performance.
Less pitch, more precision
The days of gut-driven decisions are long gone. Today’s CMOs are less Madison Avenue and more machine learning, steering brands with AI, real-time analytics, and models that drive immediate impact.
But creativity still matters, it’s just powered by precision, not instinct. The modern marketing leader is orchestrating AI-driven campaigns, optimising in real time, and ensuring every dollar spent delivers measurable growth. The challenge is clear: spending big is no longer enough, spending smart is what wins. Those who strengthen their digital marketing muscle will be the ones to shape the future.
