This composition is one that is widely used in photography. Usually there are imaginary lines that guide our eyes to see the focus in an image (point of interest) while still using the principle of the rule of thirds. These lines can be roads, rivers, or fences. You can use various types of lines such as curved, straight, zig zag, or radial. There are no specific rules regarding what lines can be used in this composition.
Source : https://genpijogja.com/20-teknik-komsisi-fotografi-yang-wajib-kamu-ketahui-bersambung.html/leading-lines-composition-1
As in the example image above, we can see that the lines on the side lead to the point of interest of the photo, which is the Eiffle tower at the end of the line.