You can change the color of your text and you can make sure that your links
scream, “I’m a FREE road to where you want to go!”

But you still have to display the URL. It’s one of Google’s rules. But you don’t
have to display it in a way that people can see it.

One legitimate trick to make the click-through link less obtrusive is to change
the URL display color to match the text description color. Now the link will
blend in with the text description and the eye will be drawn to the hyperlink
instead of the URL. Google provides these tools for you. Why not use them?

Note that the 728 x 90 leaderboard and the 468 x 60 banner do not display
the url line by Google’s design. It is not a mistake and you will not get in
trouble for the url not appearing with these ad blocks. It’s just the way it is.