Hair masking is a photo editing technique used to isolate and refine the appearance of hair in an image. This process involves carefully selecting and separating hair from the background or other elements to ensure a clean and natural look. Hair masking is often used in portrait photography, fashion, and product images to enhance the quality of the photo by improving hair details, correcting color, and ensuring a seamless blend with new backgrounds or adjustments. Advanced hair masking techniques may involve tools like layer masks, feathering, and refining edges to achieve a realistic and polished result.