In psychology, memory is an organism's ability to store, retain, and recall information.
I think that if you could add smell to a picture it would make a memory more complete.
Sometimes a smell can take you back in time.
When you smell a certain parfum it can remind you of an ex boyfriend.
It can be used to cell certain product easier.
Deodorant, then you won't have to spray it in the shop. There are so many different deodorants but you have to try them before you buy one. If there would be a picture on it with the smell of that deodorant nobody will have to try them and spray in a shop.
A picture of a cake with the smell of the cake. It will make you hungry and then you want to buy the product. You can already see it, smell it so the next step will be wanting to taste it.
