The main purpose of a pivot table is to summarize data in a quick and concise manner. The function of these is very important because they can turn boring excessive data into clear and concise data. This can allow the user to make quick decisions based on the data which makes it a great tool in the industrial world. One example I have found shows how it can be used in the political world. This second website I found has a plethora of examples and uses that can be very useful for people wanting to learn about their uses.