Before debugging at.js using your browser's Developer Tools, what should you confirm is included in the page?

In order to effectively debug at.js using the browser's Developer Tools, it's essential to confirm that the JavaScript library is included in the page. The at.js script is the core JavaScript library utilized by Adobe Target to deliver personalized content and experiences on web pages. Without this library, the necessary functions and features that allow Adobe Target to operate would be absent, rendering attempts to debug ineffective.

Checking for the presence of the JavaScript library ensures that you are working within the correct environment where Adobe Target can execute its functionalities, thus allowing you to effectively troubleshoot and analyze the behavior of the adaptive content delivery. Other elements such as global-mbox or mbox cookies may be relevant for functionality, but without the JavaScript library itself, debugging efforts would not be possible.