For certain use cases, you may be interested in how many users open a form (or other extension) without actually submitting it. You can use Google Analytics to keep track of this data. Here's how:
Go to your settings page.
Select the correct workspace on the left
In the Custom Domain section, make sure to first activate a custom domain.
Once the custom domain is active, enter your Google Analytics Tracking ID.
The custom domain feature is not available on every plan. Please refer to this article for the latest details.