Justified Text
element { text-align:justify; }
If you’ve never heard of justified text, I’m sure you’ve seen it. In fact – you’re looking at it right now! If you view my stylesheet, or in particular where I reference the body element, you’ll notice that I’ve applied the attribute text-align:justify;. This alters my typographical alignment or more simply known as the typesetting. Take a look at the differences:
justified textAenean erat ipsum, volutpat a lacinia a, accumsan quis justo. Suspendisse condimentum mattis elit, a egestas sapien tristique vitae. Integer tincidunt euismod felis at vestibulum. Nam sit amet tempor arcu. Vivamus enim mi, bibendum ut consequat vitae, tempor sit amet purus. Nullam ligula elit, consequat non viverra quis, varius interdum dolor. Nam et tellus quis libero vulputate tincidunt eget a orci. Donec congue ipsum in arcu blandit quis molestie tortor pulvinar. Pellentesque ultricies tincidunt velit, egestas aliquet erat aliquam quis. Nulla sem est, ornare nec vestibulum vitae, pharetra eget leo. Maecenas accumsan luctus massa eget aliquet.
non-justified text (ragged right side)Aenean erat ipsum, volutpat a lacinia a, accumsan quis justo. Suspendisse condimentum mattis elit, a egestas sapien tristique vitae. Integer tincidunt euismod felis at vestibulum. Nam sit amet tempor arcu. Vivamus enim mi, bibendum ut consequat vitae, tempor sit amet purus. Nullam ligula elit, consequat non viverra quis, varius interdum dolor. Nam et tellus quis libero vulputate tincidunt eget a orci. Donec congue ipsum in arcu blandit quis molestie tortor pulvinar. Pellentesque ultricies tincidunt velit, egestas aliquet erat aliquam quis. Nulla sem est, ornare nec vestibulum vitae, pharetra eget leo. Maecenas accumsan luctus massa eget aliquet.
Justified text primarily increases/decreases the spacing between words to line up words at the end of every line. This is a technique widely used in books and magazines. Justified text may also slightly alter the kerning (letter-spacing) and/or glyphs (element of writing).
Although justified text makes for a more elegant appearance, some people may not prefer it. In fact, people with dyslexia tend to find justified text harder to read. Though, dyslexia only effects an estimated 3%-4% of the population. This means you just may be justified in using it 
Reference: Wikipedia – Justification