A Simple Area charts displays the trend of the values over time or other category data. It is based on the Line chart, but the areas between the line and the base axis are commonly emphasized with colors.
In Stacked Area charts, the value of each data point is aggregated with the underlying data points' values. They're very useful when it's necessary to compare both the point values and their aggregate for the same point arguments.
Waterfall charts are an alternative to Pie charts for displaying distributions. However, when there's a need to compare the size of categories and sub-categories, Waterfall charts are the most convenient representation.
A Waterfall chart can be used for analytical purposes, especially to understand the gradual transition in the quantitive value on an entity. It can be used for various types of quantitive analysis, ranging from inventory to performance analysis.