Reading and understanding your histogram can help you to create the image that you really intend it to be. It helps a photographer for the most part when they shoot photos because it will in turn explain how simple it will be to edit in post-production. When it comes to editing, you’ll get a better idea of how the image will look on another person’s monitor when you put it on the web.
To better understand the Histogram, the folks over at the Professional Photography Tips YouTube Channel have created a video to explain how histograms work in regards to landscapes (though it can surely be applied to anything.) For what it’s worth, Histograms are most useful for landscape photographers but in some situations can work for portrait photographers. The most important thing overall though has to do with knowledge of metering.
The video is after the jump.