It is very easy to use SmartArt, which can be extremely useful for a lot of things like describing how to perform a specific task, in a step-by-step format or tons of other things.
Press Insert (1), and then press insert a SmartArt graphic (2).
Choose the category of SmartArt you want in area that has been labeled as 1, and then choose the kind you want in the area marked in black and labeled as 2.
Further reading: How to use Analysis ToolPak Add-in? How to insert pictures? Combining Data from Multiple Sheets into one file