The histogram is a photographer’s best friend, and the easiest way to understand how it works is to compare it to music.
If you look at a music equalizer, the bars on the left represent the bass, and the bars on the right represent the high notes, or treble.
The same is true with a photo’s histogram. The left represents the black tones and the right represents white tones.
Watch this video to see how you can quickly understand the histogram through music, and how you can actually “see” music.
And… watch as I pick up a guitar and strum three of the five chords I know! (I can sing better than I can play guitar… haha)