Puriscent

The sense of smell is 10,000 times more sensitive than the sense of taste.
75% of all the emotions we generate every day are due to what we smell, not what we see.
Scent affects people in a variety of ways, from mood to concentration, memory recall and emotion.
Memory for scent is resistant to time, easily accessed.
Compared to other methods like visual, scent doesn't require customers to focus their attention and they can't ignore it because they are everywhere.

Visual memory is 40% accurate after four months. The sense of smell is 60% accurate after a year.
People are 100 times more likely to remember something they smell versus something they see, hear, or touch.
Researchers have observed a 40% improvement in mood after being exposed to pleasant scents.

Nike study showed scent affected the desirability of shoes in 84% of subjects, with subects willing to pay 10-20% more in scented environments.
(2001 Harvest Consulting Group)
Samsung study showed shoppers underestimated actual shopping time by 26% and visited three times more sections when exposed to aromas.
(2008 University of California)