Multiple exposures refer to a photographic technique where the same frame is exposed to light more than once. This can create artistic effects by layering images, allowing photographers to combine different scenes or subjects into a single photograph. The technique can be achieved in-camera or through digital editing software. In film photography, multiple exposures were traditionally done by manually winding the film back to a previous frame before taking another shot. In digital photography, this can be easily accomplished using software like Adobe Photoshop or Lightroom, where layers can be blended to achieve the desired effect.