What exactly is a random act of kindness.........

A random act of kindness is a selfless act performed by a person or persons wishing to either assist or cheer up an individual or in some cases an animal. There will generally be no reason other than to make people smile, or be happier. Either spontaneous or planned in advance, random acts of kindness are encouraged by various communities. An oft-cited example of a random act of kindness is, when paying the toll at a tollbooth  on a highway, to pay the toll for the vehicle behind you as well.(Wikipedia, the free Encyclopedia)