This interaction is about tourism and culture in Vietnam. The example consists of:
1) an introduction view with title and instructions,
2) 5 animated tabs that lead to the relevant pages, and
3) an open fullscreen window with more information about the particular subject. Each window has a button that leads back to the main page (menu tabs).

What is that example intending to do? When should the user use such a theme?
This click and reveal interpretation can be used as a menu slide, making the beginning of a course more exciting and engaging. This is also a great way to split information into smaller blocks.