Iterative processes are the core of any business, and Microsoft PowerPoint provides several templates for cyclic processes: basic cycle, text cycle, block cycle, etc. Cyclic diagrams provide an easy way to illustrate a circular flow of money and goods of the buy, product, and sell process; or steps of iterative decision making of the marketing process.

Today there are two popular design styles: Material Design from Google and Metro UI from Microsoft. Both are using a flat circular progress indicator. This tip shows how to create a similar progress indicator for your presentation.

Today there are many different designs of pie charts. This tip is about the modern design of progress smoothed circle pie charts.
See also How to create an Arc length chart in PowerPoint.

Today there are many presentations with somewhat different variations of doughnut charts, like arc length chart where the presenter wants to show progress for several parameters in one chart. It is easy to create your own progress pie chart in Microsoft PowerPoint.

If you have a presentation with some charts and reports you never know how often you will need to update it. E.g., you create a quarter performance report and receive a new data every hour. In this case, instead of PowerPoint tables and charts it is better to embed Excel object. The information automatically updates after updates in the Excel table.

These seven elements of a pie or doughnut chart will teach you some important PowerPoint tricks, which will allow you to create an appealing circular diagram. It is using a combination of Excel charts and SmartArt shape editing tricks.

Venn diagram (also called primary diagram, set diagram, or logic diagram) is a diagram that shows all possible logical relations between a finite collection of different sets.

Circular diagrams are very popular, and you probably tried various SmartArt cycle flow diagrams in your presentations. This tip shows how to create an excellent presentation using an unconventional type of circular four steps diagram.

For the illustration of the complex organizational structure, you might think about using a Jigsaw puzzle. At first glance, pieces of Jigsaw puzzle look extremely complex, but this isn't true, and you will need a few simple steps to create an impressive Jigsaw puzzle chart.

If you show historical data, it is often more informative to create a timeline chart. Several different predefined SmartArt graphics can be used for timeline charts.
This tip shows simple steps for creating a simple and informative timeline using data for Microsoft logo design changes (see https://en.wikipedia.org/wiki/Microsoft#Logo).