The HTML5 Enabler should be added to which tag in a creative’s HTML file?
The Enabler is the core code library of Studio. Think of it as the brain of the creative. All components and API calls must go through the Enabler. To the HEAD tag of your HTML file, add a script tag that links to the Enabler.
Read more here:https://support.google.com/richmedia/answer/2672553