In what ways is a mouse more efficient than a keyboard?

It sometimes takes less effort to move the mouse than to press keys in the keyboard.

But the keyboard is often more efficient than the mouse. Keyboard shortcuts can be used to get tasks done in an instant, way faster than a mouse. Repetitive actions are also much easier.

1) You can click on different tabs with a mouse

2) You can easily use the on screen keyboard and click the letters with a mouse