It is for the url, Mary Ann.
First, you type in these characters exactly as you see them here:
[url="
Then you paste in the actual url after those characters, like this:
[url="http://www.beardedirisflowers.com/Thomas_Johnson_Introductions/WHY_BE_NORMAL
Now, close it off with another quotation mark and a back-facing square bracket, like this:
[url="http://www.beardedirisflowers.com/Thomas_Johnson_Introductions/WHY_BE_NORMAL"]
Next, type in the name you want to be seen. In this case, it is Why Be Normal:
[url="http://www.beardedirisflowers.com/Thomas_Johnson_Introductions/WHY_BE_NORMAL"]Why Be Normal
Then, add a square bracket, a forward slash, the letters url, then a back facing square bracket. I changed the very first bracket to the curvy one so you can see the entire character string:
{url="http://www.beardedirisflowers.com/Thomas_Johnson_Introductions/WHY_BE_NORMAL"]Why Be Normal[/url]
Changing the first bracket back to a square one. What you see now should be just the words Why Be Normal, but with an active link behind them (meaning click on the words and it will take you to that page)
Why Be Normal