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How Advertising Shapes Consumer Buying Behavior
Business Essentials · Chapter 16: Integrated Marketing Communications and AdvertisingSection 16.2 · lesson 73 of 10512 min · free with a free account
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In this lesson
What advertising actually does, and how honestly we can say so.
- Explain how advertising is thought to affect behavior
- Describe the 4 elements of an advertising message
- Explain diminishing return and wearout
- Assess the evidence on effectiveness honestly
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Integrated Marketing Communications and Advertising
How Advertising Shapes Consumer Buying Behavior
Here's a simple question with an uncomfortable answer. What does advertising actually do? This section answers it honestly, which means with some qualifications. We'll look at the proposed mechanisms, and at two competing theories of how advertising works. Then the parts of an advertising message, and what research modestly supports about making one work. We'll match emotional and rational appeals to involvement. And we'll see why repeating an ad helps, then helps less, and then starts to hurt. Finally, brand building versus activation, the measurement problem, and the ethics of claims. We close with a drinks company that showed its best ad too often.
The Honest Answer
What Does Advertising Actually Do?
The honest answer, stated plainly, is that the mechanisms are genuinely contested among researchers. And the effects that careful research does find are generally smaller than the industry suggests. They're also slower to appear than advertising's own promotional accounts of its work. That is not a claim that advertising is worthless. Large, sophisticated businesses keep spending heavily on it. That alone is evidence that they believe it achieves something worth the cost. It's a caution about confident, specific claims. Claims about exactly how, and exactly how much, a given advertisement changes behavior. The evidence supports a more modest and more qualified picture. A vivid case study, or a persuasive agency pitch, usually presents something much bolder.
Proposed Mechanisms
4 Routes, Not Mutually Exclusive
Several mechanisms have been proposed, and they aren't mutually exclusive. The first is building awareness and mental availability. That means making a brand likelier to come to mind when a relevant purchase occasion comes up. Then it's at least among the options a buyer weighs. The second is communicating information, such as features, price, or availability, that a buyer can use directly. The third is creating associations, linking a brand with images, feelings, or occasions. That shapes how the brand is perceived, even without any specific factual claim. The fourth is reinforcing existing customers' choices, confirming to current buyers that they decided well. That reduces cognitive dissonance and supports loyalty, without converting anyone new at all. But there's a filter in front of all four. Selective attention means consumers notice only a small fraction of ads. So most advertising placed is never consciously processed by its audience, however well it was crafted. And no mechanism can work on a message the receiver never registered in the first place.
Table 16.2.1
The Strong and Weak Theories
Two broad positions on what advertising accomplishes are worth stating at full strength. The strong theory says advertising persuades and converts. It can change someone's attitude toward a brand they didn't prefer, and move them to switch from a competitor. On this view, advertising is an active, offensive tool for growing share. Its evidence comes from controlled experiments showing short-term shifts in stated preference or purchase intent. And from the plain fact that large brands keep investing in new campaigns, rather than resting on awareness. The weak theory says advertising chiefly defends existing share, by reinforcing habit and existing preference. Most of its effect falls on people who already buy the brand, not on new converts. Its evidence? Big brands' market shares are considerably more stable over time than a strong conversion effect would predict. And large short-term persuasion effects are hard to replicate outside the lab, in real competitive markets. The two theories point to different budgets. The strong theory favors bold, differentiating creative aimed at competitors' customers. The weak theory favors steady, reach-focused reminder spending aimed at existing customers.
Message Elements
4 Parts of an Advertising Message
An advertising message is built from four elements. The proposition is the core claim, the specific reason the ad gives the audience to prefer this brand. The creative execution is how that proposition is brought to life. That could be imagery, narrative, humor, or any device that makes the proposition engaging and memorable. The evidence offered is whatever supports the proposition's credibility. It might be a specific fact, a demonstration, or an implied appeal to the brand's reputation. And the call to action is what the ad asks the audience to do next. Buy now, seek more information, or simply remember the brand for a future occasion. Keep the proposition and the execution separate in your mind. The same proposition can be carried by a fresh execution, and that becomes important when an ad wears out.
What the Research Supports
3 Findings, Stated Modestly
So what does research say makes advertising effective? Studies in marketing and consumer behavior journals support several findings, with modest effect sizes. First, a single, clear proposition tends to beat a message trying to make several claims at once. Receivers work with partial attention, and they retain a simple message better than a complex one. Second, distinctive, ownable execution tends to build stronger brand recognition over time. That means a style or device that becomes strongly tied to one brand. Generic execution, the kind that could belong to almost any brand in the category, does worse. Third, consistency over an extended period tends to build stronger mental availability. Creative that changes frequently never has time to become familiar. None of this guarantees a specific, large effect for any particular advertisement. These are tendencies observed across many campaigns, not a formula for predicting one.
Emotional and Rational Appeals
Involvement Decides Which Fits
A message can lean on an emotional appeal, aimed mainly at feelings. Or it can lean on a rational appeal, aimed at logical argument and factual evidence. The variable that most decides which fits better is the involvement level. In a high-involvement purchase, the buyer is motivated to work through detailed information. That tends to reward a rational appeal, rich in specific evidence. The audience is genuinely willing to process that evidence as part of a careful decision. In a low-involvement purchase, the buyer isn't motivated to process detailed argument at all. That tends to reward an emotional, or simple associative, appeal. A careful rational case is unlikely to be processed, however well it's built. But a simple feeling or association can register, even with minimal attention.
Figure 16.2.1
Repetition, Diminishing Return, and Wearout
Repetition means showing the same advertisement to the same audience several times. At first, it clearly helps. A first exposure may not even clear selective attention. Later exposures raise the odds the message is noticed and retained. But the return to more repetition isn't constant. Past a certain point, each extra exposure adds a smaller gain than the one before. That's diminishing return. Beyond a further point, called wearout, extra exposure stops helping altogether. It starts working against the advertiser. An audience that has seen the identical message many times finds it irritating, not persuasive, and response actually falls. The curve here is illustrative. The exact wearout point varies by message, audience, and category. No single number applies everywhere. The practical lesson is sharp. Spending past wearout doesn't merely waste money. It can push response below what a lower frequency would have achieved.
Brand Building vs. Activation
Different Horizons, a Shared Budget
Advertising also splits by time horizon. Brand building aims at long-term brand strength. Awareness, associations, and mental availability. It pays off gradually, over an extended horizon, often months or years. Activation aims at an immediate behavioral response, such as a purchase within days. It's measured and realized on a correspondingly short horizon. The two are often in tension for a limited budget. Money spent on immediate activation isn't also building long-term brand strength, and the reverse is true too. Neither one is simply better than the other. The right balance depends on the business's situation. How urgently does it need near-term sales, and how much long-term brand equity is it trying to build?
The Measurement Problem
Why Advertising's Effect Is Hard to Pin Down
Measuring advertising's effect runs into the same difficulty we met with attribution. There are three reasons. First, the effects are delayed. Someone exposed today may not act for weeks, or months. Second, they overlap. One campaign often runs across several channels, and their contributions are hard to separate. Third, they're confounded with everything else the business does at the same time. Pricing changes, seasonal patterns, competitor actions, and the rest of the promotional mix. Any of those could explain some, or all, of an observed change in sales. So the honest conclusion is that attribution in advertising is genuinely difficult. A confident claim that a particular ad caused a particular sales result should be examined skeptically. It should not be accepted at face value.
Care and Substantiation
Children, Vulnerable Audiences, and Honest Claims
Advertising aimed at children requires additional care. Children are less able to recognize persuasive intent, and to evaluate commercial claims critically. The area is governed by the Federal Trade Commission's authority over unfair or deceptive practices. There are also rules specific to children's advertising, and voluntary industry standards above the legal floor. The specific rules here continue to develop, so they need checking at the time. The same principle of additional care extends to other vulnerable consumers. The boundary between informing and misleading, from the previous chapter, applies here with equal force. The practical standard that enforces it is substantiation. A business must actually hold evidence for a specific factual claim before making it, not just hope it's true. Performance claims, comparisons with a named competitor, and health or safety claims all need it. And the evidence should match how consequential the claim is. The Federal Trade Commission's authority applies directly to claims made without adequate substantiation.
Case Vignette
The Message That Stopped Working
Here's a composite case, built for instruction. The company and the person are fictional. Marcus, a marketing manager at Fennimore Beverages, runs a well-performing ad for a new drink line. Seeing early success, he raises how often the identical ad is shown to the same audience. His reasoning: if it works, showing it more should work even better. After several weeks, response has fallen noticeably, below where it stood before the increase. That's measured by click-through and stated purchase intent. And the product and price haven't changed. He has three options. Hold the higher frequency and hope, cut back, or stay high but refresh the creative. The constraint is that the extra media is already bought for this period. So the trade-off is a sunk cost, against the ongoing cost of an ad that's now working against itself. The reasoning turns on wearout. Diminishing return alone would predict a plateau. Response falling below its earlier level is the signature of wearout. More frequency, or even the same frequency, won't fix audience fatigue with an unchanged execution. The sound decision is to reduce frequency, and refresh the creative execution. And keep the underlying proposition consistent with the rest of the integrated plan.
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