High Dynamic Range photography helps fill a gap between what you see in the world and what you can capture in a single image with digital camera. The long and the short of it is digital cameras can’t (yet) span the range of light our eyes and brain can handle with one click. So, by taking multiple images and combining them in a computer with specialized software and techniques, you can come close to what you see.
The technique takes practice and usually a tripod. There are a number of programs on the market to help create the images and they have strengths and weaknesses. Recently on DPS we featured a guest post which helps explain the basics, workflow and options when it comes to HDR.