On the left-hand side, there is a menu. Click the icon labeled Tasks.
Click on the Book icon to the left of the desired task. You will be brought to the task's History screen. On the left side of the page you'll see a listing of each time that task was run (including the current run if it's actively running when you're there). For each task run, you will see:
Result
Completed At
Run By
On the right side of the screen you will see two windows:
The Details window will give you specific configuration information of the settings that were chosen when the task was run.
The Log window will provide a step-by-step chronology of the events that occurred during the running of the task.