Objective : Commonly called the Mario Chart because of the bricks in suspension, the Waterfall is ideal to illustrate flows.
Application : More seriously, the waterfall makes it possible to understand the accumulation of positive and negative values over a given period.
A cascading chart can be used to show how an initial value is affected by intermediate values, positive or negative, and results in a final value. It can reveal the composition of a result. For example, it helps to better understand the impact of different stores on the overall revenue of a company in supermarkets.
For more information on chart types.