Full justification is when you can have both sides of your text even all the way down a column. That isn't a very good explanation - you know how the left side of the text always starts at the same place - in full justification the right side of the text always ends in the same place. In lots of instances it makes the text look better on the page. Hope that helps - your question was a good one!!
No apologies necessary, questions are always a good thing and we are all learning.
Fully justified text, as MaggieMae ably explained, is when the text is pulled into line at both margins. Now on a wide piece of text this usually looks a lot more modern, punchy and neat.
BUT and this is a big but, on narrow columns it will NOT look great.
This is because in order to make the text straight at both edges, the gaps in between words are literally stretched to make the text fit into a certain shape. The effect of this is sometimes called a 'white river'.
Click on the 2 screenshots and you should see what I mean.
On the first screen shot you can see that the right hand text column looks great.
Click on the second shot and you will see gaps appearing all down the page.
This effect is further complicated by two other influences:
The length of the individual words of your journalling
Whether you are using proportionally spaced fonts* (like Arial) or traditional typewriter style fonts (like Courier).
* in proportional spacing, the letters take up different amounts of room on the line, to make them look more attractive and easier to read
What an awesome explanation, FS!! I hate the ugly rivers of white, too, when you justify in a narrow column but love full justifcation for wider spaces! Loved your examples - I've seen examples of the big white gaps in the newspaper!