Google offers some of the best tools around for reporting on user activity - and they're free! So its a good idea to set that up in your site. Its called Google Analytics, or GA for short.
The first step is to go and login to Google and register for GA - https://marketingplatform.google.com/about/analytics/
Once you're registered you need to create a domain with GA, and from that you'll get a code to use in Kademi.
Step 1: Enable the GA app in your Kademi account like this.. NOTE: at the time of writing GA isnt in the Kademi marketplace, so you need to enable the app at the account level, and then enable it at the website lvel. So its a two step process. This is likely to change soon
Step 2: Enable the GA app in your website
Step 3: Enter your GA code
Save your settings, and then refresh your front end website. Note that it can take a while to start seeing stats come through to your GA account.