

This means that Lightroom protects the original file that you can go back to anytime you need to.

When you make adjustments to your image or video in Lightroom, the adjustments are stored in a catalog file that will only be embedded into the original image when exporting it. To do that, just click on the "Previous" button in the Develop module. This why one of the most useful features in Lightroom is the ability to easily transfer the same settings to another image.

Apart from Photoshop, Lightroom is one of the most useful image-editing suites in the business, a fact that is not surprising considering that both are made by Adobe.
