For Customizr-Pro and Hueman-Pro users: You can paste your Google Analytics tracking code in a specific field designed for that. Please read the following documenation:
If you’re not a developer, you can refer to this complete documentation on setting up your Google Analytics tracking code with a plugin.
Here’s a quick snippet to add Google Analytics tracking’s code to your website.
Where to copy/paste this code? => in your functions.php file of a child theme. I strongly recommend you create a child theme. Download a start-up child theme here.
Everything you need to know about child theme with Customizr here.