The alignment of the elements on your page is very important. Alignment provides the structural framework of a design. It can affect the mood of the page as well as how effective it is.
But page design can be structured, with a rigid system that is obvious, or it can be more subtle. If you understand how to align elements effectively on your Web page, you'll be able to break the rules effectively as well.
These images show you a Web page with three simple elements and how you can lay out those elements on the page to create different designs. All that is changing in the layouts is where the elements are placed on the page.