So what is an interactive user guide?

A small rectangular pop-up window that presents a brief description of a specific element on a web page (image, button, form field, text).

A help message that interacts with user actions, providing on-page contextual assistance when using a software, website, or application. It allows automating customer support and onboarding, providing more autonomy to the user when using a new platform for the first time, or having doubts.