Perfume samples are an excellent way of testing if you like the Fragrance. A quick spray in a store on a piece or cardboard doesn't give you a true indication of how the fragrance will sit on your skin as we all have different skin.
The sample sprays are also an excellent way to take your favourite perfume in your hand bag without taking a large bottle which could get damaged. This way if you want to freshen up you can give your self a spray of you favourite perfume and be on your way. Some of the sample spray will give you 30 sprays or more, I know it might not look like much but when you use a sample spray you will be suprised as to how many sprays you get.