How does the Time Tracking app work with multiple ticket tabs?

Question

How does the Time Tracking app work when I'm handling multiple tickets in Zendesk Support? 

Answer 

If the Time Tracking app has the Auto pause setting checked, the app clock stops running when you change tabs.

If the Auto pause setting is not checked, then the clock doesn't stop counting when you change from one tab to another (see Does the Time Tracking app pause when browser tab changes?).