Find a subject in front of a background of depth. Take a close viewpoint and zoom in. Focus on the subject and take a single shot. Then, without changing the focal length, set the focus to infinity and take a second shot.
As you review the two shots, how does the point of focus structure the composition?
The first image has the flowers in focus and the eye is instantly drawn to them as there is a shallow depth of field and they stand out from the blurred background.
By setting the camera to infinity, the background comes more into focus and the foreground becomes blurred. This image is way harder to look at as there is nothing in the foreground for the eye to immediately rest on.