Focusing on a wrong area in your image results in a blur. Blurred images are produced when you focus on an area and move your camera for recomposing the shot. This mostly happens in point and shoot camera where the preferred focus point is at the center. Other reasons are movement of you or the subject during focus.

What would cause an image to be blurred?

There are basically five causes of blurry photos: camera movement, subject movement, missed focus, insufficient depth of field, and lens softness.

How can I fix blurry pictures?