This is the "Do" view in which you start and stop timing activities.

The currently selected activity name here is "Eating" and its description is "meals".

You can change the name and description of the current activity at any time.

The activity ID (number) is 6. And so far you have spent 24 hours 42 minutes and 30 seconds eating meals.

At present the activity is not being timed.

To start timing the activity tap the green "Start" button

To switch over to other views ("See", "Manage", "Graph", "More"), tap on the tabs at the bottom of your iPhone screen, or click with your mouse on the tab of your interest on the iPhone image here.

And for more details see: Manual.