Layer masks let you hide or reveal parts of a layer without deleting pixels, so you can refine edits whenever your composition changes. Learn the essential rule—black conceals, white reveals—and use masks to blend overlays, isolate objects, apply adjustments selectively, and keep edits reversible. Watch the Video Practical
Read the full article here: Photoshop Layer Masks: A Beginner’s Guide to Non-Destructive Editing Photoshop Roadmap