On Desktop:
The Project Overview can be accessed by clicking on the Overview header (boxed in black) at the top of the screen:
This section gives you a quick look at the metrics relating to your project in terms of number of items, to-dos, storyboards, schedules, spaces, floors and uploads. It also stores all the general information that has to do with that project in the sidebar on the left, such as To-Dos, Photos & Uplads, Notes and the Filing Cabinet.
On Mobile App:
Go to More in the bottom right of the app. In the sidebar that pulls up, select Project Summary.
Further Reading: