The other day, I was jogging through the pine forest by the sea, and my nose was filled with a thousand smells, each linked to a memory.
In the physical world, smell plays a key role in our emotions. Personally, perhaps my sight and hearing are declining and I am compensating with my nose!
We are surrounded by videos, photos and audio of every kind, but so far we cannot store and digitise scents.
A photo of a Thai beach and one of a Brazilian beach have many similarities, but if we could also convey their smells, the differences would be clear.
You have probably walked past a restaurant giving off very inviting aromas (for example, fish or delicious arrosticini skewers): our brain processes them quickly, visualises the food and makes our mouth water.
Conversely, a bad smell outside, or even worse inside a restaurant, spoils any dish you might want to enjoy.
Neuroscience and neuromarketing studies show that the nose is extremely sensitive and can convey emotions, with a powerful ability to associate particular aromas with particular situations.
What scent marketing is and how it works
Scent marketing, or olfactory marketing, is a structured discipline that uses fragrances as a strategic tool to influence emotions, memory and purchasing decisions, with very solid neuroscientific foundations.
The aim of scent marketing is to create an empathetic relationship between brand and person, building an emotional bond that makes every contact experience memorable. An environment scented in a coherent way lifts the spirits of customers and staff, makes their stay more pleasant and leaves a trace anchored in memory over time.
The right smell in the right context can turn a simple visit to a shop into a vivid memory that resurfaces whenever the customer encounters the same fragrance again.
Olfactory logos and scent branding
At the heart of many scent-marketing strategies is the olfactory logo: a customised fragrance designed to embody a brand's values, style and personality, just like a visual logo or an audio jingle.
Repeated use of this olfactory signature across all physical touchpoints allows people to recognise the brand unconsciously. In practice, the nose precedes the logo: customers sense the smell and the brand lights up in their memory before they even see the sign.
- it captures identity and values in a single olfactory note
- it makes the brand recognisable even with your eyes closed
- it aligns every physical space, from the entrance to rooms or aisles
There are plenty of famous examples: vanillin, which immediately recalls baby care and historic brands such as Borotalco, or major hotel chains that have adopted dedicated scent signatures. Westin uses a fresh, relaxing white-tea fragrance, while St. Regis chooses an elegant blend of rose, sweet pea and pipe tobacco.
Strategic application of fragrances
Scent marketing should never be applied randomly. First define the objective: welcome, energy, luxury, relaxation, security, hunger or concentration. Then design the strategy, intensity, diffusion points and most suitable fragrance.
Diffusion can take place using sprays in small, controlled environments, or professional diffusers, ducted systems or brandable lamps in larger spaces. Fragrances can also be applied to printed materials and packaging, extending the olfactory signature into the customer's home and making communication more memorable.
- stimulating aromas such as lemon, mint, rosemary and eucalyptus encourage energy and concentration, ideal for offices, conference rooms, gyms and high-tech stores
- relaxing aromas such as lavender, basil, cinnamon, citrus and vanilla convey wellbeing and emotional security, useful in spas, waiting rooms or dental practices, where they can reduce anxiety and stress
Where scent marketing really works
In theory, any sector in which customers spend time in a physical space can benefit from good olfactory design. In practice, the best results occur in specific contexts where the fragrance fits the environment, product and brand promise perfectly.
Retail and clothing stores
In retail, smell influences behaviour and dwell time. Experimental studies show that with a simple scent in the air, customers stay longer and may spend an average of up to 20 per cent more than in an unscented environment, especially when the fragrance is one-dimensional and requires little mental processing.
Overly complex fragrances force the brain to decode them, reducing the cognitive resources available for choosing a product, evaluating its price and deciding to buy. A clear aroma consistent with the product category, by contrast, accompanies customers and makes the process easier.
Luxury fashion
In luxury fashion stores, scent marketing plays an even stronger role: fragrance becomes an implicit signal of quality, exclusivity and attention to detail. A sophisticated but discreet scent amplifies the perception of elegance and reinforces every intangible aspect of the brand, from service to product presentation.
Hotels, hospitality and tourism
In a hotel, smell is often the first sensory contact with the brand. The entrance, lobby, corridors and rooms can share the same scent signature to communicate comfort, cleanliness and a sense of home. Some research suggests that fragrance influences the overall assessment of a stay more than the infrastructure, food or even staff.
In a hotel experiment, lavender and verbena essences showed a positive impact on customer satisfaction with key service elements such as the room, staff and cuisine, under otherwise identical conditions.
Casinos, entertainment and restaurants
Scent marketing has long been used in Las Vegas casinos to make the environment more pleasant and stimulating. In some cases, customers spent significantly more in deliberately scented areas than in neutral ones.
In restaurants, olfactory design is even more delicate: the fragrance must interact with real cooking smells without artificially covering them. A scent consistent with the cuisine can encourage appetite, while the wrong smell can generate immediate distrust.
The neuroscientific foundations of scent marketing
These strategies' effectiveness comes not from vague suggestions but from the neurobiology of the olfactory system, which works uniquely compared with the other senses.
Direct connection with the limbic system and memory
Sight, hearing and touch first pass through the thalamus, which acts as a sorting centre for sensory information. The olfactory signal, however, has a privileged route: it directly reaches the structures of the limbic system, particularly the amygdala and hippocampus, responsible for emotions and episodic memories.
This is why a fragrance smelled in childhood can bring back extraordinarily vivid memories of people, places and specific moments, even decades later.
Olfactory memory lasts longer and is richer in context than visual memory: it recalls not just the image, but the whole emotional scene in which the smell was perceived.
Largely unconscious cognitive processing
Smell almost always works below the threshold of awareness. Even when we pay no attention to smells, they continue to influence judgements, preferences and behaviour. Research shows that ambient scent's effect is predominantly cognitive: it changes inferences and evaluations rather than simply altering mood.
Measurable results
Meta-analyses of hundreds of experiments indicate that exposure to pleasant fragrances can generate estimated average increases of between 3 and 15 per cent in sales performance, with peaks of up to 23 per cent under the most favourable operating conditions.
- increase time spent in the shop
- distort time perception, making time seem to pass more quickly
- improve assessments of the perceived quality of products and services
Critical conditions for effectiveness
Achieving these results requires more than diffusing a pleasant fragrance. Certain technical conditions must be rigorously respected.
congruence: the smell must fit the product, environment and target audience
aroma structure: simple, one-dimensional fragrances work better than overly complex blends
intensity: the fragrance must be perceptible but never intrusive, otherwise it causes discomfort and drives people away
Challenges, risks and ethics of scent marketing
Like any persuasive technology, scent marketing brings ethical questions and risks that should not be underestimated.
Unconscious manipulation and olfactory nudging
Because smells can bypass rational cognition and influence choices, time perception and the feeling of value, there is a risk of slipping from improving the experience into outright manipulation. Olfactory nudging uses cognitive biases to benefit the company: brands must decide how transparent to be about these techniques.
Health, sensitivities and transparency
Many people are sensitive or allergic to fragrances, especially synthetic ones: headaches, nausea and asthma attacks are far from rare side effects. Fragrances can also be misused, for example to cover unpleasant smells or conceal poor product quality.
Subjectivity and olfactory habituation
Smells are highly subjective: what some people find pleasant can be unbearable to others. Added to this is olfactory habituation: after a few minutes, we no longer consciously perceive the fragrance, even though it continues to act subliminally on the nervous system.
A good scent-marketing project does more than choose a pleasant fragrance: it balances effectiveness, respect for people and ethical consistency with the brand's positioning.
When these levels align, scent marketing stops being a mere sales trick and becomes a powerful tool for designing more human, memorable and sensorially complete experiences.