Project overview provides general information about project
In this part, you see total events in your project, which is important to maintain due to billing. Total customers shows number of total unique customers in the project without checking if these customers have any IDs or attributes. Average DAU last 28 shows daily average of customers which had at least one event that day.
Project overview also shows project token and project secret which are important for Exponea integration and event tracking. From here, it is also possible to check the integration progress in Review integration. This is mainly important when initially setting up the project.