Short answer
Scent marketing in retail uses a carefully chosen ambient scent to support the shop environment and brand identity. The best retail scent suits the product range, interior and audience and is dosed so subtly that it feels like part of the space.
A physical shop has a sensory advantage
Online shopping is efficient, but a physical shop can let people experience a brand fully. Customers see materials and products, hear music, feel textures and move through a real space. Scent can add an extra recognisable layer to that experience.
That is especially valuable when a shop wants people to remember not just a product, but also the atmosphere of the visit.
The scent must suit the concept
A beachwear shop, jeweller, interior store and pharmacy do not have the same olfactory brief. The scent must match the brand personality, price level, materials and desired energy.
For a minimalist fashion store, a transparent musk or wood accord can work; for a botanical concept, a green or aromatic direction is more obvious. These are not rules, but examples of how scent language is linked to brand language.
Think in zones
Not every square metre needs to smell equally strong. Entrance, fitting rooms, lounge areas and checkout have different functions.
In large shops, zoning can be interesting. In smaller shops, one well-placed machine is often sufficient, provided the air flows are used correctly.
Avoid olfactory fatigue
Staff smell the scent every day and get used to it. Customers come in with a fresh nose. So don't let employees keep turning the machine up because they perceive the scent less after a few hours.
Measure more than turnover
Retailers can track length of stay, conversion, average spend and customer feedback, but can also ask which words visitors associate with the shop. This makes it clear whether the scent supports the desired positioning.
A shop scent should be noticeable, not explanatory
When customers immediately ask "which spray do you use?", that can be nice, but it is not the primary goal. The strongest scent experience feels as if the space simply should smell that way.