This feature is only available in the Pro version of Independent Analytics.
A click is recorded when a link matching one of the Link Patterns defined in the Click Tracking menu is clicked.
For example, let’s say you are tracking clicks on email links and PDF files only. When you display the Clicks metric in the Pages report table, it will show a count of how many times a link matching one of those two patterns was clicked on that page.

It’s also helpful to know that both left and right mouse button clicks are tracked. Visitors often right-click links to open them in a new tab or download the resource as a file, so it’s important to include these clicks too.