Promotion Changes Behavior. Brands Change Belief.

Most marketing budgets treat advertising and sales promotion as close cousins doing roughly the same job. They are not. One changes what people do. The other changes what people think. Confusing the two is one of the most reliable ways to spend money efficiently while slowly dismantling the thing you were trying to build. This article breaks down how advertising, sales promotion, and publicity each function differently, what the research actually shows about their long-term effects, where the promotional landscape has shifted, and what any of this means when you sit down to plan a campaign.

Key Takeaways

• Advertising builds belief over time; sales promotion changes behavior right now. These are different jobs that require different tools and different success metrics.
• Promotions that drive volume without also building meaning tend to train consumers to wait for a deal rather than choose a brand.
• According to Les Binet and Peter Field's landmark IPA study (based on over 900 case studies), the most effective long-term media allocation sits around 60% brand building to 40% short-term activation.
• Publicity operates on a different axis entirely: unpaid, credibility-driven, and often more persuasive than either advertising or promotion precisely because it does not ask for anything.
• Legal and ethical obligations in marketing communications are not optional constraints layered on top of strategy. They are part of the strategy.

The Classic Idea: Two Different Machines

Here is the foundational idea, stated plainly: advertising works on the inside, and promotion works on the outside.

Advertising is a paid form of communication intended to inform, persuade, or remind a target audience about a product, service, or brand. It functions over time. A well-constructed advertising campaign does not necessarily cause someone to purchase today. It shifts their mental picture of a brand, builds familiarity, and reduces the friction of future decisions. This is sometimes called building mental availability, the probability that a consumer will think of a brand when a purchase occasion arises.

Sales promotion does something entirely different. It offers a short-term incentive: a coupon, a discount, a BOGO, a free sample, a rebate. The goal is behavioral. Move someone from browsing to buying. Clear the shelf. Get the trial. The mechanism is external pressure rather than internal persuasion, and it works, but only in the moment and only under the right conditions.

Publicity sits in a third category. It is unpaid media attention generated through public relations activity: press releases, events, media relationships, sponsorships, crisis response, and community engagement. Because it is not paid for, it carries credibility that advertising structurally cannot, which makes it disproportionately powerful when it can be earned.

Understanding these distinctions is not academic housekeeping. It is the prerequisite for building a communication strategy that does not eventually eat itself.

What Everyone Gets Wrong About Promotion

The misunderstanding goes something like this: if promotions drive purchase, and purchase drives loyalty, then promotions build loyalty. It sounds logical. It is not supported by the evidence.

Les Binet and Peter Field's research across more than 900 IPA case studies found that short-term promotional campaigns are effective at driving volume but almost never influence pricing power, long-term loyalty, or profit margin. Worse, they tend to make consumers more price-sensitive over time. A shopper who buys your product because of a coupon has not necessarily decided your product is worth more. They have decided it was worth it at that price, on that day. Raise the price, remove the coupon, and a meaningful percentage of that "loyalty" walks out the door.

According to Numerator's research, 45% of shoppers say they are likely to switch brands for a better deal. That number should not be read as a criticism of consumers. It should be read as a description of what happens when promotion is overused as a substitute for brand building.

There is also a subtler problem. The overall volume of trade promotions has roughly doubled in recent years. Digital coupons have grown 40%, and digital temporary price reductions have grown 60% over a two-year period (Numerator, 2025). When everyone promotes at the same volume, no individual promotion stands out. The promotional noise floor rises, and the cost to get noticed rises with it. Brands that rely primarily on promotion to drive behavior find themselves on a treadmill that requires progressively more spending to produce the same lift.

This does not mean promotion is broken. It means promotion deployed without a corresponding investment in brand building becomes a dependency.

What Has Changed in the Promotional Landscape

The mechanics of promotion are not what they were a decade ago. A few shifts are worth examining carefully.

Retail media networks have complicated the distinction between advertising and promotion. Retailers are no longer purely sales channels. Platforms like Amazon, Walmart Connect, and Kroger Precision Marketing now sell advertising placements alongside promotional placements in the same environment. According to Nielsen, retail media in the US is expected to grow 20% in a recent measurement period, compared to 4.3% for the total ad market. The implication is that brand-building activity and promotional activity are increasingly being bought through the same interface, which creates both opportunity and confusion about what a given investment is actually doing.

Personalization has raised both the ceiling and the floor on promotional effectiveness. Retailers can now serve different promotional offers to different consumers based on purchase history. A shopper who buys full-price yogurt every week might receive no coupon at all. A lapsed buyer might receive a meaningful discount. This is more rational than blanket discounting, but it also introduces complexity: the brand's promotional spend now varies by consumer, which makes aggregate measurement harder.

The path to purchase starts earlier and in more places. Digital promotions now appear on third-party delivery platforms, in retailer apps, through loyalty program portals, and via social commerce. This means a consumer can encounter a promotional offer before they have formed any particular brand preference. That changes what the promotion is doing. It is no longer just closing a decision. Sometimes it is initiating one.

The table below outlines how advertising, sales promotion, and publicity differ across the dimensions most relevant to campaign planning:

What This Means Operationally

So you have a product, a budget, and a communication strategy to build. How does any of this translate into actual decisions?

How should you allocate budget between brand building and activation?

The Binet and Field research suggests a rough benchmark: approximately 60% toward brand-building activity and 40% toward short-term activation. This ratio is not a rule so much as a starting point. Categories differ. Consumer packaged goods behave differently than software subscriptions. But the underlying logic holds across most contexts: you cannot activate people who have never formed a preference, and activating people who already have strong brand preference costs less and converts better.

The practical problem is that most organizations measure what is easy to measure. Short-term promotional ROI shows up in next week's numbers. Brand-building ROI shows up in next year's pricing power and margin. This creates an institutional bias toward promotion that the budget allocation data reflects: many advertisers end up closer to 80% activation and 20% brand building, which is the opposite of what the evidence recommends.

How do you evaluate advertising campaigns without fixating on the wrong numbers?

Advertising effectiveness measurement requires tracking the right variables across the right time horizon. The core metrics include reach (how many unique people saw the ad), frequency (how often), brand recall (can they remember it unprompted?), brand awareness (do they recognize it?), and brand lift (has perception of the brand improved?). Return on Advertising Spend (ROAS) is useful but captures only the immediate conversion signal, not the long-term compounding effects.

A beverage company that runs a summer campaign and sees modest immediate sales gains might actually be running a high-performing campaign if brand recall improved significantly among a key demographic. Conversely, a campaign that shows strong short-term ROAS while eroding brand sentiment is a problem that will not appear in the dashboard until it is expensive to fix.

How do you design a sales promotion that does not undercut the brand?

The question worth asking before any promotion launches is: what behavior am I trying to change, and for whom?

Consumer promotions (coupons, discounts, samples, loyalty offers, contests) work best when the objective is clearly defined. Getting trial from a new customer segment requires a different tactic than retaining a price-sensitive existing customer or driving trade-up to a premium product variant. Blanket discounting tends to do all three things simultaneously, and none of them particularly well.

Trade promotions (allowances, display incentives, slotting fees, cooperative advertising arrangements) operate at the retailer level. The goal is channel cooperation: getting the product stocked, featured, and merchandised effectively. These require their own evaluation logic. The relevant questions include whether the promotion drove incremental sell-through, not just sell-in, and whether the retailer featured the product in ways that built category visibility rather than just clearing inventory.

Across all promotional design, a few principles hold: the offer must be easy to understand, the timing and duration must create urgency without desperation, and the communication channel must match the audience's actual behavior. A flash sale communicated via direct mail to a segment that primarily shops via mobile app is not a promotion problem. It is a channel problem dressed up as a promotion.

How does publicity fit into a communication plan?

Publicity tends to get treated as a bonus: nice when it happens, hard to count on, easy to cut from the budget when things get tight. That framing underestimates it.

Because publicity is unpaid and editorially independent, it carries a different kind of authority than advertising. When a trusted journalist covers a product launch, or when a significant event generates organic media attention, the credibility transfer is real and often more durable than a paid placement. Managing publicity requires consistency in messaging across all PR efforts, a balance between proactive pitching and reactive response, and ongoing monitoring of sentiment and coverage quality.

The metrics for publicity effectiveness are different from advertising and promotion: media mentions, share of voice against competitors, sentiment distribution (positive versus neutral versus negative coverage), and downstream effects on web traffic and lead generation. A fashion brand that measures the impact of its runway show in terms of media mentions alone is missing the richer picture. The more useful question is whether the coverage reached the right audience with the right sentiment at the right point in the purchase cycle.

The Legal and Ethical Layer You Cannot Treat as Footnotes

Most discussions of marketing law frame it as a constraint: here are the things you cannot do. That framing makes ethics feel like a fence rather than a feature of good strategy.

The regulatory environment for marketing communications is substantive. The Federal Trade Commission (FTC) in the US requires that advertising claims be truthful, non-deceptive, and supported by evidence. This applies to performance claims in ads, to endorsements and testimonials (influencer disclosures fall here), and to comparative advertising. A skincare company claiming clinical results needs substantiation. A fitness app claiming specific outcomes needs evidence. The requirement is not that you hedge every claim into uselessness, but that you can back up what you say.

Data privacy obligations add another layer. The GDPR in the EU and the CCPA in California both establish consumer rights around how their data is collected, stored, and used in marketing. Email marketing, behavioral targeting, and personalized promotional campaigns all intersect with these requirements. Compliance is not optional, and the cost of getting it wrong (in regulatory penalties, consumer trust damage, and press coverage) tends to far exceed the cost of getting it right.

Advertising to children and other vulnerable audiences carries specific restrictions that vary by jurisdiction. Toy manufacturers, food brands, and financial services companies all operate in environments where the line between persuasion and manipulation has been defined by regulators, not by the brand.

The ethical dimension is broader and less codifiable. Avoiding manipulative tactics (fear-based advertising, high-pressure sales design, misleading fine print) is partly a legal matter and partly a question of what kind of relationship a brand wants with its audience. Cultural sensitivity in global campaigns is not just about avoiding offense. It reflects whether a brand has actually engaged with the audience it claims to serve. Stereotypes are not just ethically problematic. They are strategically lazy.

The Real Work Is Knowing Which Tool You Are Holding

The distinction between advertising and sales promotion is one of the oldest ideas in marketing communication. It is also one of the most consistently ignored in practice.

Promotions are visible, fast, and measurable within a reporting cycle that executives actually care about. Brand building is slow, contested, and produces results that look modest until suddenly they do not. This is why marketing budgets drift toward activation over time, and why brands that built strong equity through advertising sometimes find themselves in a race to the bottom on price when they stop.

The organizations that consistently outperform over the long run tend to be the ones that maintain investment in brand building even when short-term pressure argues otherwise, design promotions around specific behavioral objectives rather than revenue targets alone, and treat publicity as a strategic asset worth earning rather than a pleasant surprise.

None of these things are guaranteed to work. A well-funded brand campaign can fail if the creative is weak. A promotion can drive real incremental volume rather than just subsidizing purchases that would have happened anyway. The point is not that one tool always beats another. The point is that each tool does a specific job, and confusing them produces results that neither fully explains nor fully solves.

Pick up the right tool. Know what it is actually for. Then measure the thing the tool was designed to do.

Frequently Asked Questions

What is the fundamental difference between advertising and sales promotion?

Advertising works on attitudes and beliefs over time. It builds brand recognition, creates emotional associations, and positions a product in the consumer's mental landscape. Sales promotion works on behavior in the near term. It offers a tangible incentive to purchase right now. Both are legitimate tools, but they serve different purposes and should be evaluated on different timescales.

Can sales promotions hurt a brand in the long run?

Yes, under certain conditions. Research from Les Binet and Peter Field's IPA effectiveness database (covering more than 900 case studies) found that campaigns focused primarily on short-term promotions tend to increase consumer price sensitivity over time. Consumers learn to wait for a deal rather than choosing a brand on its merits. This does not mean promotion is inherently damaging, but it does mean that promotions deployed as a substitute for brand building tend to create a dependency that becomes harder and more expensive to break over time.

What is the recommended split between brand building and short-term promotional activity?

Based on the Binet and Field IPA research, the most effective long-term allocation is approximately 60% toward brand-building activity and 40% toward short-term activation. This ratio varies by category, market maturity, and business objective. The important thing to understand is that most organizations currently operate at a ratio closer to the inverse, which the research suggests leads to systematically lower long-term returns.

What is the difference between consumer promotions and trade promotions?

Consumer promotions target end buyers directly: coupons, discounts, samples, contests, rebates, and loyalty programs. The goal is to trigger trial, repeat purchase, or category switching at the consumer level. Trade promotions target retailers, distributors, and channel partners: buying allowances, display incentives, trade allowances, and cooperative advertising arrangements. The goal is channel cooperation, getting the product stocked, displayed, and featured effectively. Both types require their own design logic and their own measurement approach.

How should publicity be measured as part of a marketing communication strategy?

Publicity measurement goes beyond counting media mentions. The more useful variables are share of voice (your brand's media presence relative to competitors), sentiment distribution (what proportion of coverage is positive, neutral, or negative), and downstream behavioral effects like changes in web traffic, search volume, or lead generation following a coverage event. Sentiment analysis tools can process large volumes of coverage at scale. The goal is to understand whether earned media is reaching the right audience and shaping perception in the intended direction.

What are the main legal obligations marketers must understand?

The primary legal considerations for marketing communicators in the US include truthfulness in advertising claims (FTC requirements), proper disclosure of paid endorsements and sponsorships, compliance with data privacy regulations (CCPA in California, GDPR for any activity reaching EU residents), adherence to intellectual property law in creative work, and category-specific rules around advertising to children or other regulated audiences. These are not edge cases. They apply to standard campaign activity, and non-compliance carries both regulatory and reputational consequences.

What makes a sales promotion incremental rather than just subsidizing existing purchases?

An incremental promotion generates sales that would not have happened without the offer. A subsidy simply discounts a purchase the consumer was already going to make. Distinguishing between the two requires panel data or consumer research that tracks whether on-promotion buyers are new to the category, new to the brand, or simply existing buyers purchasing earlier or in larger quantities. Many promotions look successful in aggregate lift data but show minimal incrementality when buyer behavior is examined at the individual level. This distinction matters enormously for calculating the true return on promotional investment.