In the email editor the hyperlink tool offers the ability to assign a name to a link that will be seen in your click reporting, seen in the image below:
Link reporting name can be very helpful when the same URL is used as a link in multiple places in an email. For instance, you may have a text link, a button, and an image all linked to the same URL, http://www.google.com.
Using the link reporting name feature, you can incorporate slight changes so your reports easily display which place the http://www.google.com URL was clicked.
For the text link you might use a link reporting name of "Google - Text"
For the button link you might use a link reporting name of "Google - Button"
For the image link you might use a link reporting name of "Google - Image"
These test descriptions will be displayed clearly in your click tracking report.