Actions basically allow you access to the skill set of a Photoshop expert, even if you’re not quite there yet. You can use actions for anything from setting up frequency separation in the retouching stage to giving your photos an entirely different look with intricate color grading. They aren’t extensions or add-ons, which also enhance what you can do with the program, but in different ways.
Their code is prewritten to carry out a specific set of edits, so all you have to do is press the little “play” button. Photoshop actions are one-click sequences that allow you to automatically make complex edits in seconds.