Adobe Lightroom is best to use for managing your library and completing most of the standard editing tasks in a non-destructive way (i.e., the original file is always accessible). It is also ideal for batch edits, such as editing a wedding gallery more efficiently. On the other hand, Photoshop is best for when you need to make significant changes to a photo, such as editing out a person or stitching photographs together. If you need to add text or do any graphic design work with images, Photoshop is also the better option.