High Dynamic Range (HDR) in photography is a technique used to capture a broader range of luminosity levels in a single image. This is achieved by taking multiple photos of the same scene at different exposures and then blending them together to create a final image that represents the full tonal range of the scene. HDR photography is especially useful in situations where there is a wide contrast between light and dark areas. By combining these images, photographers can achieve a more balanced and detailed final image, allowing for rich colors and enhanced details in both the shadows and highlights.