In 1923, Claude C. Hopkins published a book that would forever change the way we understand advertising: “Scientific Advertising”. Hopkins, considered by many to be one of the fathers of modern marketing, was the first to speak of the need to treat the consumer not as a mass, but as an individual.
“The best advertisements don’t ask anyone to buy. That’s useless […] Advertisements should be based entirely on service,” he wrote. His basic principle was simple but revolutionary for the time: people don’t buy products, they buy personal reasons to do so.
A century later, although technology and ways to connect with consumers have changed, his idea remains an essential pillar of marketing. We must understand how consumers think, feel, and decide. A good campaign doesn’t focus solely on selling, but on connecting. It doesn’t speak to everyone; it speaks to each person. Therefore, personalization is key to achieving that emotional relevance.
Why is personalized marketing so effective? The 3 Psychological Principles that Underlie it
The public’s attention is a scarce commodity in an era of overstimulation, where we are bombarded every day with thousands of visual, auditory, and emotional stimuli. The brands that stand out are not necessarily the biggest, but rather those that know how to connect with their audience, generating interest and trust.
In this context, personalized marketing is not simply a segmentation technique, but a strategy that activates emotions and strengthens the connection with the brand. But for it to work, it’s not enough to adapt the message; it’s necessary to understand the psychological principles that underlie it and explain why a message seems “made for me” and compels us to act.
1. Perceived Relevance
Our minds are programmed to prioritize information that they consider useful or meaningful. For this reason, in an environment saturated with stimuli that demand our attention, generic messages often get lost. On the other hand, a personalized message that responds to our interests and connects with our value system will attract more attention, we will perceive it as more valuable, and we will remember it better. Neuroscience confirms this. A study conducted at the University of Granada found that personalized messages generate greater activation in the brain networks associated with memory encoding and retrieval.
Consequently, personalized messages not only capture attention from the first moment, they also retain them better, “Which could facilitate their integration and lead to behavioral changes,” the researchers concluded. This explains why personalized emails or product recommendations based on our preferences have higher conversion rates than generic messages.
2. Principle of Reciprocity
The principle of reciprocity states that when someone receives a benefit or a kind gesture, they usually feel indebted and respond positively. In marketing, this means that a brand that demonstrates attention and understanding of consumer preferences awakens a sense of consideration that can motivate interaction, loyalty, or purchase.
Personalization functions as a symbolic gesture that conveys a clear message: we have thought of you to adapt our product/service to your needs. In fact, Cialdini’s research on social influence shows that reciprocity increases the likelihood of action, even when the perceived benefit is small or intangible.
Therefore, an email with personalized recommendations, a small gift, or a customized promotional product not only offers value, but also triggers a sense of “social obligation” to respond positively to close the reciprocity loop.
3. Identity and Belonging
One of our deepest needs is to feel part of something, which implies being accepted and recognized by that group. In fact, we all build our identity through the social categories to which we belong, be it a community,social group, brand, or ideology. Therefore, our purchasing decisions are also a way of expressing who we are.
Personalized marketing directly appeals to this identity dimension: when a brand adapts its message, tone, or content to the consumer’s personal characteristics, it communicates a clear message: we see you, we understand you, and you are part of us. If a brand reflects our values, lifestyle, or aspirations, we will perceive consistency and feel validated.
A study conducted at Vanderbilt University revealed that when people perceive that a brand reflects their identity or that of their reference group, emotional connection increases. It’s no coincidence that consumers talk about their favorite brands as if they were extensions of their personality.
How to Apply Personalization in Marketing: From Tailored Messages to Promotional Products
Personalization isn’t limited to inserting a customer’s name into an email. For it to truly work, it’s necessary to intelligently apply the psychological principles mentioned above in the design of each advertising campaign.
1. Relevance: Telling What Matters to Each Person
The first step is to ensure that each message is meaningful to the recipient. This involves analyzing behavioral data, purchase history, interests, and/or previous interactions with the brand. After gathering this information, the content must be tailored so that the consumer perceives the message as addressing their specific needs.
In practice, it can be as simple as recommending products based on previous purchases or segmenting campaigns by specific interests. For example, an email offering accessories for a type of sport the customer practices will have more impact than a generic one featuring “The entire summer catalog.” Perceived relevance captures attention, improves recall, and increases the likelihood of purchase, because the brain recognizes that the information is useful and applicable.
2. Reciprocity: Offering value to generate action
Recalling the ideas of Hopkins and Cialdini, it’s important to give before asking. A thoughtful gesture, even a small one, triggers the impulse to reciprocate. In marketing, this can translate into tutorials tailored to the customer’s interests or early access to an exclusive product. These personalized actions not only communicate attention, but also naturally motivate the consumer to interact or participate, because they perceive that the brand cares about offering them something useful.
Personalized promotional products, from a notebook to a reusable bag or a water bottle, for example, are gifts that not only reinforce the brand image but also become a “symbolic favor” that activates reciprocity. This way, the person will develop a greater predisposition to interact, purchase, or gain loyalty.
3. Identity and Belonging: Making the Customer Feel Part of Something
Personalized marketing should convey the feeling that the brand understands who the person is and should convey the message that they are part of a relevant group aligned with their identity. This is precisely what Apple has achieved with its products, but also many other brands that champion values such as sustainability or social responsibility.
There are many ways to achieve this goal: by creating exclusive online communities where customers can share experiences or by offering promotional products that can become symbols of belonging. For example, a sportswear brand could send personalized T-shirts or caps to returning customers with messages aligned with the group’s identity, while a sustainable brand could give away reusable water bottles with personalized messages about environmental protection. Every time a consumer uses that product, they will not only remember the brand, but their sense of being part of a community with shared interests and values is also reinforced, which will increase their loyalty and commitment.
Ultimately, personalization is not just a marketing strategy; it’s a way to connect with consumers’ emotions and values by offering something useful, relevant, and that reinforces their identity. Therefore, every tailored email, recommendation, or promotional product can make the difference between a message that goes unnoticed and a lasting connection with the brand.
References:
Casado-Aranda, L.-A. et. Al. (2025) Neural mechanisms of memory formation for tailored messages: A neuroimaging study. Journal of Advertising; 1–20: 10.1080.
Cialdini, R. B. et. Al. (2012) Reciprocity by Proxy: A Novel Influence Strategy for Stimulating Cooperation: A Novel Influence Strategy for Stimulating Cooperation. Administrative Science Quarterly; 56(3): 441-473.
Edson, J. &Betttman, J. R. (2005) Self‐Construal, Reference Groups, and Brand Meaning. Journal of Consumer Research; 32(3): 378-389.
Cialdini, R. B. et. Al. (1975) Reciprocal concessions procedure for inducing compliance: The door-in-the-face technique. Journal of Personality and Social Psychology; 31(2): 206–215.
Hopkins, C. C. (1923) Scientific Advertising. Library Of Congress: Washington.
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