NOTE - Follow the link to know How to get your Google Analytics ID
Google Analytics lets you measure your advertising ROI. The tracking ID is a string in the format - UA-000000-2. This can be included in your Landing Pages. The option to add this information can be found both within the Builder as well as in the Dashboard.
NOTE - This is a page-level setting. i.e You can have one set of Google Analytics ID for your landing pages and this cannot be changed for each of the Variants for that landing page.
In the builder - Navigate to Global Settings Panel > Tracking Codes and click on the Tracking IDs Tab.
In the Dashboard - Navigate to the tab Settings > Tracking Codes > Google Analytics ID