“An action is a series of tasks that you play back on a single file or a batch of files—menu commands, palette options, tool actions, and so on. For example, you can create an action that changes the size of an image, applies a filter to the image for a particular effect, and then saves the file in the desired format.” – From Photoshop Help File.
The above says it all: By using Photoshop Actions, you can greatly improve your productivity and efficiency, especially if you would like to apply the same effect over and over again. I use it all the time
In this post, I have included 10 Highly Useful Articles (Intro + Roundups) that Talk About Photoshop Action, which I have in my personal collection for you to go through. Get ready for some actions!