We are great believers in creative freedom, and unrequired alignment of slide objects such as shapes is probably as bad a design decision as aligning nothing at all. In the end, every decision to align needs to stem from your creative thoughts — sometimes it works, and some other times, an unaligned bunch of shapes looks perfectly natural and organic. Also remember that alignment works with more than just shapes — and you can also combine shapes with other slide objects and align them all together.
Learn how to align shapes in PowerPoint 2013 for Windows.

