The Schedule view shows you all of the activities available for this project, grouped by week. By default, it will scroll to today's week immediately on opening.
The Activity Schedule screen
Clicking on an activity reveals more information about that activity, as well as any Daily Logs for this activity (known as "Activity Logs") that have been created.
The Activity Overview screen
Clicking further to the "Logs" tab reveals all of the Daily Logs that have been created for this Activity. Daily Logs that exist inside of an Activity are also called "Activity Logs"