Possibilities are left side, right side, or centered. Choose only one alignment and use it on the entire page. This doesn't mean that everything needs to be aligned along the same edge. It just means that everything should have the same alignment, either all left, all right, or all centered. Most beginners want to center everything.
Centered alignment can be effective, but mostly they lose any strong focal point.
The edges have no definition. The center-aligned list will look best on a page that has center alignment for the rest of it. Everything is centered here. Notice a much stronger alignment here, plus the page is designed to use the dimensions of a monitor, rather than a printed flyer. There are implied relationship between items that are close together, so make sure that you put related items together, and unrelated items spaced apart.