You have 10 images and you need to prepare them for your website.
Your images must be resized to 620 by YYY pixels(YYY will be filled automatically). You also need to Posterize them and add some blur to the outer parts of them.
Your final images should look like this:
Do you really need to do that to all of them one by one?
There is much faster way, so that the next time, when you have to resize hundreds of images and put effects to them, you can do so with pushing only one button.
Tip: Action Palette.