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The False Precision of ROI: Why “Measurable Marketing” Is Quietly Undermining Growth

For the past decade, marketing has been reshaped by one dominant idea:

If it can’t be measured, it shouldn’t be funded.

On the surface, this seems rational. Accountable. Even disciplined.

In practice, it has led many organizations, especially performance-driven ones, to systematically underinvest in one of the most important drivers of long-term growth:

Brand building.

This is not a philosophical argument. It is a well-documented strategic mistake.

The Shift Toward Measurable Marketing

The rise of digital platforms brought with it a seductive promise:

  • Real-time attribution
  • Clear cost per acquisition
  • Campaign-level ROI
  • Immediate feedback loops

For CFOs and CEOs, this looked like progress. Marketing, finally, could be managed like a financial instrument.

So budgets followed:

  • Increased investment in PPC, paid social, retargeting
  • Reduced investment in broad-reach, harder-to-measure channels
  • Greater emphasis on short-term conversion metrics

Over time, a new assumption emerged:

Performance marketing is more effective because it is measurable. That assumption is flawed.

What the Evidence Actually Shows

The most comprehensive research on this topic comes from Les Binet and Peter Field, based on analysis of over 1,000 campaigns through the IPA Databank.

Their conclusion is both simple and uncomfortable:

The most effective marketing strategies balance short-term activation with long-term brand building.

Their findings, summarized in The Long and the Short of It, show:

  • Performance marketing drives short-term sales activation
  • Brand advertising drives long-term demand creation
  • Over-investment in activation leads to diminishing returns over time

They also identified an optimal balance for many categories:

  • Approximately 60% brand building
  • Approximately 40% activation

This is not arbitrary. It reflects how markets actually behave over time.

Demand Capture vs Demand Creation

Most performance marketing does one thing very well:

It captures existing demand.

When someone searches, clicks, or engages with a direct-response ad, they are often already in-market. The intent exists before the ad appears.

Brand advertising does something fundamentally different:

It creates future demand.

It increases:

  • Familiarity
  • Trust
  • Recall
  • Preference

These effects are not immediately visible in a dashboard. But they materially impact future conversion rates, pricing power, and customer acquisition cost.

A useful way to frame it:

  • Performance marketing harvests demand.
  • Brand marketing grows it.

Organizations that only harvest eventually run out of field.

The Illusion of Full Measurement

A critical flaw in many KPI-driven strategies is the assumption that digital channels are fully measurable.

They are not.

Modern attribution systems systematically miss:

  • Cookie rejection and privacy restrictions
  • Cross-device behavior
  • View-through influence
  • Offline conversations and referrals
  • Delayed conversions
  • Channel interaction effects
  • Brand-driven search uplift

Since iOS privacy changes and the decline of third-party cookies, these gaps have widened significantly.

This creates a dangerous situation:

The most visible metrics are not the most complete metrics.

Performance dashboards often over-credit the last interaction and under-credit the broader system that made that interaction possible.

Brand advertising is not unmeasurable. The harsh truth is that measuring it properly requires time, statistical rigor, and investment, through tools like brand lift studies or econometric modeling. For most organizations, that level of measurement is out of reach and impractical, so brand advertising typically gets labeled as “unmeasurable,” while easier, but incomplete, metrics take its place. 

What Happens When You Over-Optimize for ROI

Companies that aggressively shift toward measurable channels tend to follow a predictable pattern:

  1. Short-term ROI improves
  2. Brand investment declines
  3. Lead flow begins to weaken
  4. Cost per acquisition increases
  5. Conversion rates soften
  6. Price sensitivity rises
  7. Growth slows

This is not hypothetical. It is repeatedly observed across industries.

Harvard Business Review has noted the same trend, warning that performance marketing has crowded out brand building because it is easier to measure, not because it is more effective.

Brand Advertising Is Not “Soft”

One of the most persistent misconceptions is that brand advertising is vague or intangible.

In reality, its effects are highly concrete:

  • Increased branded search volume
  • Higher clickthrough rates across all channels
  • Improved conversion rates
  • Greater pricing power
  • Reduced long-term acquisition costs

Research from Ehrenberg-Bass Institute reinforces this through the concept of mental availability:

Buyers are more likely to choose brands that come to mind easily.

Broad-reach, emotionally resonant advertising increases the likelihood that your brand is considered when a buying decision is made.

That advantage compounds over time.

Why This Matters More Now

Ironically, the case for brand investment is becoming stronger, not weaker.

Three structural shifts are driving this:

  1. Privacy constraints are reducing attribution accuracy
    What appears measurable is becoming less reliable.
  2. Digital channels are becoming more competitive
    Increased bidding pressure is driving up acquisition costs.
  3. Commoditization is accelerating
    Without differentiation, performance marketing becomes a race to the bottom.

In this environment, relying solely on measurable channels is not just incomplete. It is risky.

A More Accurate Model for Modern Marketing

The goal is not to abandon performance marketing.

It is to rebalance it.

A more effective model recognizes:

  • Short-term activation converts existing demand
  • Long-term brand building creates future demand
  • Both are required for sustained growth

Or more directly:

If you only measure what is easy, you will optimize for what is incomplete.

Final Thought

The question is not whether brand advertising “works.”

The evidence is clear that it does.

The real question is whether organizations are willing to invest in outcomes that are:

  • Less immediate
  • Less attributable
  • But significantly more durable

The companies that get this right are not choosing between brand and performance.

They are managing both, deliberately, with a longer-term view of growth.

Sources

  • Les Binet & Peter Field, The Long and the Short of It, IPA
  • Les Binet & Peter Field, Marketing in the Era of Accountability
  • Harvard Business Review, How Brand Building and Performance Marketing Can Work Together (2023)
  • Byron Sharp, How Brands Grow
  • Ehrenberg-Bass Institute research on mental availability

Paul Provost

President & Founder of 6P Marketing, Paul helps leaders grow great businesses with strategic, data-driven marketing. For 20+ years he’s guided organizations across sectors = manufacturing, economic development, nonprofits and more, linking brand, digital, and demand generation to measurable outcomes. A board-seasoned advisor and co-founder of Public Trustworks, Paul is known for practical counsel, clear strategy, and building trust with stakeholders. He writes about planning, brand leadership, and the habits that turn marketing into sustainable growth.

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