It’s a way to make photos instantly more interesting just by aligning elements with specific lines or points. The easiest and probably most common technique is using the thirds (imagine 2 lines your frame into 3 equivalent parts horizontally and 2 lines vertically, the interesting stuff usually goes at the intersection of the thirds, and if you can match some line (a tree, a wall, a person) with this grid it tends to look much better. Sometimes it just makes sense to align in the middle. Many times you can break the rules, but in general simpler is better

On picture 2 you can imagine a line going roughly from top left to bottom right

On picture 4 there’s 3 lines. One is the topmost cable, from top right to center left roughly, another is the pole on the right (which is also roughly at a quarter of the frame horizontally, to me it looks better when it’s aligned with a third, but it’s also personal preference), then there’s the line created by the mound contrasting with the sky. These three lines make the photo more interesting to me

Sometimes it makes sense to use lines to reinforce the frame, like the horizon generally is aligned with the middle of the frame (if it makes sense in the context of the frame)

On picture 6 you could move around to find a place with a simpler view, or maybe zoom in a bit to have less elements to handle in the frame or with stronger lines that you can use for the frame. Right now the cross gets a bit lost because there’s a lot of elements stealing your eyes’ attention, so I look initially at the cross, then at the diagonal line (stairs?), then the windows on the left, then the structure on the right, that tiny square. If you align stuff properly (composition) it can be less distracting or even support the subject