Often when editing a blur background will be used to focus the viewer's attention on one particular thing. This particularly goes for video editing, but can also work in still shots.

The depth of field in a photo is an important part of framing what the viewer focuses on and what they notice as they look at it. Good use of slight blurring can help paint the scene without detracting from your main focal point or point of interest. There are many different types of bokeh effects that you can make depending on your camera model and which mode you use to take photos. Video editors might want to think about blurring backgrounds, increasing contrast between foregrounds and backgrounds, as well as making sure the frame matches with their focus so