Video: Lightroom global adjustments: should you use them?
Although most of us typically stick to the global adjustment sliders when editing our images in Lightroom, there's a good argument for starting your editing workflow with local adjustments instead. It's something landscape photographer Thomas Heaton's most recent video takes a look at in detail.
Heaton's approach starts to make sense when you break an image down into its different parts. If you consider editing a landscape image for example, the sky and highlights may need to be edited quite differently to the foreground and shadows. With global adjustments, you'll eventually have to tweak local areas anyway, while starting with local adjustments allows you to skip this step.