Navigate to Settings > Integrations > Google Analytics and check the box to Enable Google Analytics.
Enter your Google Analytics Tracking ID from your Google Analytics account. You can then track visits to your OpenApply site in your Google Analytics account.
You can also enter a Google Tag Manager code. This will be in a format such as 'GTM-123ABCD'. Please note that if you are only using Google Tag Manager, and not a Google Analytics Tracking ID, there is no need to check the box for 'Enable Google Analytics'. You can simply enter your Google Tag Manager code into that box, and then Save Changes.