Guerrilla Marketing: Research on What Works and What Doesn't

The term "guerrilla marketing" was introduced by American marketer Jay Conrad Levinson in his 1984 book. The premise was simple: small businesses cannot compete with large corporations on budget, but they can compete on unconventionality. Instead of money, they use surprise, context, and engagement.

Since then, the concept has spawned dozens of definitions and thousands of case studies. However, the honest question remains: what actually works, and what is just a pretty story for a marketing blog?

Academic research on guerrilla marketing in the strict sense is sparse—it is a field with a deficit of randomized experiments and an excess of retrospective case studies. A 2022 systematic literature review (International Journal of Economics, Finance and Management Sciences), which covered 100 articles from 2012–2022 and selected 17 methodologically sound studies, confirmed: guerrilla marketing positively influences brand awareness and purchasing decisions for small and medium-sized businesses. However, the size of the effect and the conditions of its emergence require closer examination.

Below are three mechanisms through which guerrilla marketing works and two through which it fails.

Mechanism 1. Word-of-mouth: The most powerful and least controllable channel

The core of most guerrilla campaigns is the expectation that people will tell others about what they saw. This is not just a tactical assumption—it has a measurable basis.

Nielsen studies consistently show: 83% to 92% of consumers trust recommendations from acquaintances more than any other form of advertising. In its reviews, McKinsey identifies word-of-mouth as the primary factor influencing purchase decisions—depending on the product category, it determines 20% to 50% of buying choices.

What does this mean in figures? A Wharton School of Business study recorded that customers acquired through recommendations bring in an average of $0.45 more profit per day than customers from other channels, and their acquisition cost is $23 lower. According to Nielsen data, a customer who comes via recommendation is four times more likely to make a purchase than one who saw an advertisement. The lifetime value of such customers is 16% higher, and retention is 37% higher.

This leads to an important practical conclusion. A guerrilla action that does not generate conversation is just cheap advertising with an uncertain result. The value of guerrilla marketing is not that it is "unconventional," but that the unconventionality triggers word-of-mouth. These are different things, and they require different designs.

What specifically triggers word-of-mouth? Jonah Berger of the Wharton School of Business, in his book Contagious (2013), based on a decade of research, identified six factors that make an idea or experience contagious: social currency (something people want to share because it raises the narrator’s status), triggers (associations with something familiar), emotion, public visibility, practical value, and narrative. Guerrilla campaigns that leverage at least three out of the six are more likely to spread on their own.

Mechanism 2. The emotional punch and the surprise effect

The second mechanism is physiological. Research in neuromarketing and the psychology of advertising shows that emotional appeals work significantly better for memory retention than neutral ones. A 2025 academic study (Indian Journal of Future Research and Management) directly comparing emotional and rational advertising recorded: emotional appeals result in a higher level of brand recall and a stronger intent to purchase than rational appeals based on facts and characteristics.

The mechanism is understandable through neuropsychology. The amygdala, the brain structure responsible for processing emotions, is involved in forming long-term memory. An event that triggers an emotional response is remembered better because it is marked as significant. This is applicable to advertising: a neutral banner leaves no trace, while an unexpected street installation does.

For guerrilla marketing, this means that surprise is not just a technique to attract attention. It is a mechanism for encoding information into long-term memory. Studies by Dinh and Mai (2015) and Yildiz (2017), cited in the 2022 systematic review, showed: surprise as such positively affects the perceived credibility of the message and the purchase intent.

Humor works through a similar mechanism but with a caveat. A study with 425 participants from Egypt (Farid and Hammad, 2019) showed that advertising with elements of humor, transparency, and surprise within guerrilla campaigns is effective across all business sectors. However, the humor must be relevant and linked to the brand—unrelated humor is remembered for its own sake, but does not help people remember the brand.

Mechanism 3. Physical interaction and procedural memory

The third mechanism is unique to guerrilla marketing itself because it often operates offline and creates a bodily experience. Research on experiential marketing documents a consistent pattern: physical interaction with a brand creates a deeper memory imprint than passive perception.

The reason is the type of memory involved. Passive observation of advertising engages declarative memory (facts and images). Physical participation in an experience engages procedural memory—the type associated with actions and motor skills. Procedural memory is more stable and less susceptible to interference from competitors.

This explains why guerrilla actions involving engagement (trying, doing, participating) work differently than just a bright installation that is merely watched. When a person has done something in conjunction with a brand, they remember it longer and are more willing to talk about it—because it is their story, not the brand's.

When guerrilla marketing does not work

Honesty is required here—because there are as many failures as successes, they are just written about less frequently.

Mismatch with the brand. The most common mistake is a campaign that "explodes" on its own but does not connect to the brand. People remember the event and do not remember who organized it. This is measurable: research on humor in advertising shows that humor unrelated to the brand works for remembering the humor itself but does not transfer associations to the brand. A good guerrilla campaign is one where you cannot remove the brand without losing the point of the action itself.

Counting on virality. One of the most persistent misconceptions in marketing is the idea that "good content spreads by itself." Research shows: most content that creators think will go viral does not. Virality is not a result of content quality alone, but a result of the content engaging the right triggers (per Berger) and hitting the right network at the right moment. Building a business plan around an expected viral effect is a flawed strategy.

Legal and reputational risks. Some guerrilla actions balance on the edge of what is permitted—unauthorized installations, use of third-party infrastructure, provocative visual solutions. This creates risks that are difficult to predict: the action can end in a fine, removal, or a wave of negative coverage that outweighs any positive effect. A classic example is the 2007 Cartoon Network campaign in Boston, where light devices placed around the city were mistaken for explosive devices, triggering an evacuation and costing the company $2 million in fines.

Failure to reach the target audience. Guerrilla marketing works through context—it must reach the specific people for whom it was designed. An action in the wrong place, with the wrong cultural code, or in front of an audience that is not the target, yields no results regardless of the quality of the idea. This is especially important for B2B—contextual street installations rarely reach decision-makers for procurement.

What this means for an entrepreneur with a limited budget

The data on word-of-mouth convincingly shows: for small businesses, organic recommendations are not just one of the channels, but the primary driver of growth. Guerrilla marketing, unlike traditional advertising, is justified precisely as a way to trigger this engine artificially—to create a situation people will want to tell others about.

But this only works under certain conditions. Several practical takeaways follow from the data.

Design for conversation, not for reach. The question when developing an action is not "how many people will see this," but "will at least a portion of them want to tell someone about it, and why?" If there is no answer to the "why," the action will not trigger word-of-mouth regardless of the audience size.

Surprise must be thematic. The most effective guerrilla campaigns use surprise not for its own sake, but as a way to express the brand's essence. If you remove the company name, it should be unclear what it was. If it is still clear, the link to the brand is built correctly.

Physical interaction is more valuable than passive viewing. If you have a choice between an action that is watched and one that is participated in, the data speaks in favor of the latter. Participation creates procedural memory, which is more stable and generates more stories.

Treat word-of-mouth as a channel, not a bonus. Recommendations have measurable metrics—NPS (Net Promoter Score), the number of "by referral" inquiries, and the cost of customer acquisition through this channel compared to others. If you do not measure these metrics, you do not know if your guerrilla marketing is working—you are just hoping it is.

Do not replace strategy with tactics. A one-time flashy action does not replace systematic marketing. Word-of-mouth data shows: real effects come not from flashes, but from consistent actions that build positive customer experience. Guerrilla marketing works as a catalyst for this process, but not as a replacement for it.

Conclusion

Guerrilla marketing works—provided it relies on real mechanisms: it triggers word-of-mouth, creates an emotional imprint, and engages people in physical interaction. It does not work when it is built around the hope for virality, is unconnected to the brand, or creates legal risks that outweigh the effect.

For an entrepreneur with a limited budget, this means: money can be saved, but not by skimping on thinking. A good guerrilla campaign requires more thinking, not less spending.

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Sources:

1. Rahmatullah, S., et al. The Effectiveness of Guerrilla Marketing for Small Business: A Systematic Literature Review // International Journal of Economics, Finance and Management Sciences, 2022. — https://www.researchgate.net/publication/365312743

2. Berger, J. Contagious: Why Things Catch On. Simon & Schuster, 2013. — https://jonahberger.com/books/contagious/

3. Nielsen. Global Trust in Advertising Report. Nielsen, 2021. — https://www.nielsen.com/insights/2021/trust-in-advertising/

4. Schneider, B., et al. Referral Programs and Customer Value. Wharton School of Business Research. — https://knowledge.wharton.upenn.edu/podcast/knowledge-at-wharton-podcast/the-value-of-customer-referrals/

5. Dinh, T.T.H., Mai, N.K. Guerrilla Marketing's Influence on Purchase Intention // International Journal of Advanced Research in Management and Social Sciences, 2016. — https://www.researchgate.net/publication/313869961

6. Farid, D., Hammad, M. Guerrilla Marketing Effectiveness Across Business Sectors. Study of 425 participants, Egypt, 2019. Cited in: Systematic Literature Review (2022).

7. Levinson, J.C. Guerrilla Marketing. Houghton Mifflin, 1984. — First edition, which established the concept.