HDR (High Dynamic Range) is a technology used in photography and video to capture a wider range of brightness levels than standard imaging techniques. It allows for more detail in both the darkest and brightest parts of an image, resulting in a more realistic and vibrant representation of scenes. In HDR imaging, multiple photos are taken at different exposure levels and then combined to create a single image. This process enhances the overall contrast and color accuracy, making it especially useful in challenging lighting conditions, such as landscapes with bright skies and dark shadows.