What is an action in Photoshop?

Actions are set of commands that you have to record once and playback any number of times according to your need. Just suppose you have 100 photographs and you want to change the size of all of the photographs so you can create an action of if and apply to all of 100 photographs so you do not need to change the size of all of your photograph manually Photoshop will do it automatically for you. Or we take another example here if you want to make an array of passport photo means picture package so you can once record an action for it and then within a few seconds you will create picture package by using recorded action in future. In short we can say an action is a set of commands that can be played any number of times.

Most of the commands can be included in actions but some are not.

Start Photoshop and then click “Window > Show Actions”. It will display action palette as shown below.