Bokeh refers to the aesthetic quality of the out-of-focus areas in a photograph, characterized by a soft, blurred background that enhances the visual impact of the main subject. This effect is often achieved by using a wide aperture, creating a shallow depth of field that isolates the subject from its surroundings. Bokeh adds a sense of depth and artistry to images, creating a pleasing contrast between the sharp focus on the subject and the smoothly blurred background. Photographers often experiment with different lenses and aperture settings to achieve unique and visually appealing bokeh effects, contributing to the overall artistic composition of their photos.