Simplicity (photography)

[2] Backgrounds can be entirely neutral, like a solid backdrop or a cloudless sky; or they can complement the image, like a starfish on the sand.

Macro settings on digital cameras tend to do this automatically, as they have a narrow depth of field to begin with; the same effect can be achieved with manual adjustment.

A photograph showing simplicity should have a clear reason the subject was chosen.

This relates to shallow depth of field as well, which blurs out the background and focuses on what is the main subject of the photograph.

Whether said subject is in the center or otherwise does not matter as this is strictly a product of photographic composition.