This page shows the overall summary of Task Details like Task Name, Description, Start/Dude dates, Priority and Status. You can also generate the PDF version of the task details in this subsection.
The assignees subsection shows the list of employees involved in the tasks and their progress in the task.
The dependencies subsection shows all the predecessor and successor tasks links and the workstreams.
Under the More Details you can see information about task costs and time spent.
If you want to see how much time is spent by each employee in the task, then Time Entries tab will be handy. You can see the timesheet comments, date, and status of each time entry in the report.