Something that catches the viewers attention.
When everything is emphasized, nothing is emphasized.

part of the composition that attracts the viewer’s attention

Contrast refers to difference. Any type of difference in imagery will result in that element becoming a focal point. Difference or contrast can come in many forms. Difference in color, value, texture, shape and form can all create contrast. By combining elements, you can increase the contrast that is created, thus strengthening the focal point.

Whenever one object or element is separated from a group it becomes isolated and in turn, becomes a focal point

A focal point that is not exactly in the center is preferred. By placing an object or element just off the center, the artist can create a focal point through placement without affecting the aesthetics of the work.

A fourth way to create a focal point in artwork is to use implied lines to direct a viewers eye to an object or element

Sometimes an artist will introduce an object or element that is unusual to the scene. This object will stand out and demand attention thus creating a focal point.