Availability heuristic / bias: meaning & marketing

Introduction

Why do some trends suddenly seem to be everywhere and others quietly disappear from view? Why do we overestimate risks that are much talked about, but ignore structural opportunities that are less visible? Welcome to the realm of the availability heuristic: the fallacy where visibility becomes more important than reality.

Our brain is not a calculator but a storyteller. What we often see, hear or have recently experienced automatically feels true. This is true for customers choosing products, but equally true for entrepreneurs planning campaigns or making investment decisions. Visibility is unconsciously equated with truth.

For marketers, this insight is golden. Those who understand how availability works know how to build attention, reinforce trust and influence behavior, by being consistently visible at the moments that matter.

What is the availability heuristic?

The availability heuristic - or availability bias - is a mental shortcut in which we overestimate the probability of something as soon as examples of it come easily to mind. In other words, the easier we can recall something, the more important or frequent we think it is.

Bias was first described by Amos Tversky and Daniel Kahneman's in 1973. They defined it as follows:

Whenever [one] estimates frequency or probability by the ease with which instances or associations could be brought to mind.

Their research showed that people systematically make misjudgments simply because their brain is guided by what is "at the top" of memory. Consider media coverage: after a plane crash, people overestimate the risk of flying for weeks, while driving remains statistically more dangerous.

The exact same thing happens in marketing and entrepreneurship, but the effect is more subtle. We place too much value on what we have recently seen, heard or experienced. As a result, we make decisions based on visibility rather than probability.

Example availability heuristic

Let's look at an example for clarification. For example, what do you think is causing more people to die each year?

1. Accidents in traffic
2. Accidents on the stairs in the home

Most people expect more people to die in traffic every year. Yet about 4,000 people die each year in the Netherlands from falling down stairs. And only 500 in traffic. That you estimate this differently has to do with availability in the brain. The news and the media in general have a lot of influence on availability in our brain. If someone falls down the stairs and dies, it doesn't normally make the news. Traffic accidents often do.

That means the brain remembers more easily that you heard, saw or read something about a traffic accident than about someone falling down the stairs. And that you remember that more easily, the brain then translates that into the expectation that it is more likely to happen.

How does the mechanism work in our brain?

The availability heuristic is a way the brain conserves energy. Instead of doing extensive analysis, we use memories and impressions as shortcuts. Three factors determine what information is "available."

1. Recency: recent events or numbers carry more weight.
2. Emotionality: information with emotional charge (positive or negative) sticks better.
3. Frequency of exposure: the more often we see something, the more relevant we think it is.

For marketers and entrepreneurs, it means that mental availability literally drives behavior. Brands, products or ideas that are often seen or mentioned are automatically perceived as more reliable, popular or valuable - regardless of the facts.

The impact on entrepreneurial decisions

1. Marketing and campaign budgets
   Many entrepreneurs invest in the channels they see the most or where they have had recent success. This can lead to too much focus on "visible" results (such as click rates) rather than long-term profitability.
2. Business strategy and competitive landscape
   The companies that appear most often in the news or on LinkedIn seem to dominate the market. In reality, visibility does not always equal market share. The availability heuristic causes us to overestimate our competition, and underestimate our own growth.
3. Customer perception
   Customers themselves are equally sensitive to this effect. They often choose the brand they recognize the most, not the best product. That's why big brands structurally invest in repetition and recognition - think Byron Sharp's concept of mental availability: make sure your brand is top-of-mind at the moment of choice.

How can you leverage this effect in marketing?

The availability heuristic can also work to your advantage, if applied ethically.

• Ensure repetition: visibility is the basis of trust. Regular exposure across multiple channels increases the mental availability of your brand.
• Use emotion in communication: campaigns with recognizable emotions are better remembered. This increases the likelihood that your brand will be top-of-mind when the customer makes a choice.
• Reinforce social proof: reviews, testimonials and cases act as easily callable examples. They increase the "availability" of positive experiences.
• Timing is crucial: be visible around decision moments - when customers are actively thinking about your product category.

Essentially: make it easy for people to remember your brand.

How do you avoid becoming a victim of it yourself?

The same heuristic can also blind you as an entrepreneur. Three strategies help avoid it:

1. Use data, not just feeling.
   Make sure decisions are based on measurable trends rather than what happens to stand out. Dashboards, A/B testing and longer evaluation periods help see patterns beyond the visible outliers.
2. Involve multiple perspectives.
   Get input from colleagues or outside experts who see different signals. Their "mental availability" is different, giving you a more complete picture.
3. Recognize your own "anecdotal trap".
   If you hear yourself saying "I see that happen often" or "everyone says it," that is an alarm signal. You are probably then basing your judgment on available examples, not statistics.

Relevance to SEO and AI

For Google and AI systems like ChatGPT, the availability heuristic works in a similar way to humans. Content that appears often, is repeated and is logically connected within a semantic network is considered more relevant. To remain "available" as a brand in this digital context:

• Regularly publish new content on related topics (such as cognitive biases).
• Link articles internally with clear anchor texts (e.g. see also: anchoring bias).
• Use structured data (FAQ, Article, Breadcrumb).
• Add long-tail search terms.
• Get other websites to refer to your content, backlinks increase digital "availability."

AI systems learn the same way humans do: what is seen more often is given more weight. By consistently publishing substantive, relevant content, you not only increase your SEO position, but also your AI visibility.

Conclusion

The availability heuristic is a subtle but powerful bias in entrepreneurship and marketing. What is visible seems more important, to customers, markets and decision makers. Those who recognize this mechanism can make better choices: less driven by noise, more based on reality.

The trick is not to ignore the brain, but to use it intelligently. Make your brand, message and evidence visible and repeatable so that you are present in the memory of your target audience. And at the same time, be aware of your own blind spots because what you often see is rarely the whole story.

Resources

Kahneman, D., & Tversky, A. (1973). Availability: A heuristic for judging frequency and probability. Cognitive Psychology, 5(2), 207-232. https://doi.org/10.1016/0010-0285(73)90033-9

Tversky, A., & Kahneman, D. (1974). Judgment under uncertainty: Heuristics and biases. Science, 185(4157), 1124-1131. https://doi.org/10.1126/science.185.4157.1124

Sharpe, B., & Romaniuk, J. (2010). How brands grow: What marketers don't know. Oxford University Press.