A Flow chart is a representation of defining many processes in the form of a diagram. The diagram includes various steps in a chronology according to which the task needs to perform. We write each step of the whole process in different polygons. Every polygon represents different characteristics.
Why do you need it?
We need a flow chart to illustrate each step of a process by its characteristics. The round-cornered rectangle consists of starting and ending steps. A simple rectangle shows a process. We use a diamond to visualize decision-making. The arrows in the whole diagram represent the direction of the flow of steps. Excluding these symbols, there are a lot more symbols used for specific works.
What kind of data you can visualize with it?
A flow chart is best suited for steps-related data. Assume you have a programming algorithm, then you can use a flow chart to spell out the logic behind the process, before really starting to code. Some other examples of such types of data sets are project planning, process documentation, documenting workflows, etc.