Difference between Apply and Apply As Shape in modifier stack?

Support Basics & Interface
1

Can someone explain me better the difference? Thanks
Paolo

2

With Apply, the modifier will be removed and you will have a mesh in the modified shape. With Apply as shape, the original shape of your mesh will remain and a Shape key will be added for the modified shape; you have to adjust the value of the shape key see the modified shape. This would be useful if you want to animate a change in shape from the original to the modified form.

3

thanks AlanK. all clear

4

Cool, I did not know that. So we can use modifiers to make shape keys. Great!