Time is not to search which is your tab from multiple tabs, time is to Control tabs from one place.
Do you work with lots of tabs like 15 or 20 and get confused which is the required tab sometimes. Then time is not to search the correct tab from multiple opened tabs under multiple chrome windows. Time is to control all tabs from one place. Search and work with tabs opened under multiple windows.
Activate Tab: Switch to new tab same chrome window or another chrome window without hassle of searching for tab.
Deactivate Tab: Not using a particular tab for some time, Clear the memory usage by deactivating it.
Remove Tab: Not using tab, remove it.