Photos are the most useful way to save happiest moment of life for future reference.
There are several photos which are related with some specific incident and once you see that picture memories of that incident get fresh in your mind. It is because of this from centuries making album of photos has been around trend. Aside from this there are a few photos which you want display on walls of your property for instance photo of kids when they took their first step, first step of the newly married bride in your home etc.