When you create links in TYPO3, it is a good idea to give them a title. When search engines scan you page, they analyze and evaluate links. If you feel that site you link to is good, you can help a little to that site to position better in ratings by write a nice title in your link.
I prefer writing links in third form. Something like "Open a nice blog of someone" or "Show an article about RealURL configuration".
If you use TYPO3, giving title to a link is simple. Just write it in the box outlined in the window shown below while inserting a link.

You need to insert the image, then click the image so that it is selected and click the insert image button again to enter a title for it.
I wonder why there's no title field in the wizard when inserting the image right away...
cheers
Ingo