It's important to know how many learners are interacting with your school by looking at your conversion rates, site visits and more. Google Tag Manager is just one of a series of analytics software that your school can integrate with to get this job done.
On your Admin dashboard, go to the Site tab:

Next click Tracking on the sub-menu tab. Here you will see the Google Tag Manager section towards the bottom:

Go to your Google Tag Manager account and copy the code (as shown below) and past it into the Google Tag Manager input box (shown in the purple box above):

Now you'll be ready to track conversions, website analytics, do retargeting, and more, for all your marketing needs.