How do I use Google Analytics or similar with Jiglu?

Go to System settings and choose the Page elements option. In the Custom JavaScript setting field, paste the code snippet from Google Analytics and then select the Save button.

Note that by default Jiglu does not allow inline JavaScript to be used by setting a Content Security Policy that prohibits it. If you want to use the standard Google Analytics JavaScript then you will first need to go to System settings, select the Appearance category and the change the Inline scripting needed setting to Yes.