This widget is container for other widgets, This mean you can insert any widget inside it
How it works :
1- When you go to Appearance -> Widgets you will see widgets area called tabbed widgets this widget area is the container for tabs each widget in this widgets area will be a tab
2- Add Momizat – tabbed widget to your Sidebar and select your widgets container
Did I can add Multiple Tabbed widgets?
Sure you can just add multiple tabbed widgets but in this case you need to add Custom sidebar to use it as container