What is usage tracking?

For each API function, there is a setting in the function details called Usage tracking. 

This feature can be enabled to track any time that the function is called in any of your apps. If you enable usage tracking by clicking the box, you can see all of the instances of that function being ran in the Usage tab.

Within this tab, you can see when the function was ran as well as all of the information that got passed via the function’s parameters.

To sum up, usage tracking is an incredibly powerful feature that provides you traceability of every time someone runs one of you API Functions, regardless of where it is ran from.