Lines can play an important part in taking images. They are also an easy aspect. Some examples of a line: a road, a row of trees or shrubs, a fence, a course of water. The ‘line’ is placed so it leads the viewer into the image.
Don’t forget that shadows can also serve as lines. It can be used for the same purpose.
This image is not the best, but it serves as an illustration.
I prefer the softer S-curves. They are more elegant and invite a more thorough exploration of the image. S-curves are a bit harder to find. The most likely places are creeks and dunes, roads often offer a curve.
One caution with using lines: do not place them so they exit the image. It can also be tricky to have a fence in the foreground running from left to right. It makes it harder to ‘enter’ the image.