Photography is about learning to see. I can't teach someone to see. Your photographic "eye" is developed after years of observation, learning to see what is important to you and what other's might miss.
One way to improve your photography and to learn to see better is through composition techniques such as the rule of thirds and symmetrical composition. Image are created with line, shape, color, value, texture, form, and space - are organized or composed according to the principles of art and design.
Usually image compositions are most effective or most compelling when they are unbalanced, not centered, when the main subject takes more space and the lesser subjects take less space.
Non-symmetrical composition "Old Hudson In The Snow Black And White" by Edward M. Fielding
But in some cases when the subject lends itself to a even, balanced, centered composition, symmetrical composition can enhance the fact that the subject is perfectly balanced.
A symmetrical composition is balanced, and has an overall equality of Size, Shape, Line, Line Direction, Texture, Value, and Color. It is capable of division into equal parts. A symmetrical composition uses the Elements by repeating them, and is therefore of minimum contrast.
Examples of Symmetrical Composition