Short answer
Scents can be particularly powerful memory cues. Olfactory processing is closely linked to brain networks for emotion and memory, and scents are often linked to situations, places and people without us consciously paying attention to it.
A scent doesn't need a name
We are often better at recognising a scent than at naming it. You can know immediately that a scent is familiar, while the word "iris", "vetiver" or "orange blossom" doesn't come to mind straight away.
This shows that olfactory memory doesn't work exclusively verbally. A scent can evoke a complete sense of place or time before we have rationally named what we are smelling.
Scent and autobiographical memory
Research on odour-evoked memory describes how scents can evoke vivid and emotional autobiographical memories. Think of sunscreen that takes you back to childhood holidays, a particular detergent that reminds you of your parents' home or wood and leather that remind you of a specific shop.
That effect is not guaranteed for every scent. It arises from what someone has experienced before. The same rose can feel romantic to one person and smell like a childhood garden to another.
Why is this interesting for brands?
A brand cannot programme personal memories. It can, however, consistently build up a new association.
When visitors experience the same recognisable scent in a hotel lobby, shop or showroom, that scent can gradually become part of the overall brand memory. That is why consistency is more important than constantly switching because a new perfume sounds attractive.
Recognisability takes time
A signature scent works mainly as a recurring signal. Interior, service, visual identity and scent are stored together as one experience. How often someone is exposed to that combination, how distinctive the scent is and how strong the experience was all influence the association.
So there is no scientific rule that a customer will recognise a brand scent after exactly three or five visits.
The power of subtle repetition
A brand scent doesn't have to be loud to become memorable. A subtle, consistent presence in particular can ensure that the scent becomes part of the space rather than a separate product that demands attention.
For Inscentive, that is a core principle: the scent must gain meaning through the context in which it is experienced.