Aftershave is a lotion, or possibly a less viscous liquid, that a man may splash on his face after shaving. The purpose of aftershave is to earn a profit for the company that makes it and, often, to repel people with its overpowering scent.
The aftershave makers won’t tell you that, but it’s true.
They’ll say that the purpose of they particularly wonderful aftershave is to cool, smooth and heal the skin of your face after you spend a few minutes scraping it with a sharp blade (or two or three or four sharp blades because the razor blade companies have to turn a profit too by selling us their overpriced, multi-blade cartridges).
Depending on the aftershave, its maker might also imply that it will drive women crazy in a good way. Literally driving them crazy is not usually a desired outcome.
Don’t believe what they tell you. They’re in it for the money. You heard it hear first.