The rule of thirds is a very effective photographic technique that typically makes the composition of your photos more artistically pleasing.
Supposedly, the human eye naturally gravitates to the intersection points when an image is split into thirds. In the photo below, the sky takes up two-thirds of the space horizontally and the bridge covers two-thirds of the space vertically.
Here the tower occupies the left third, with the birds in the center grid.
But as Katherine Hepburn said, “If you obey all the rules you miss all the fun”… so go ahead and have some fun by placing the subject right smack in the middle where it belongs!
The first, second and fourth photos were taken in Budapest, Hungry; the third, in Nuremberg, Germany.