To cloak a Link, click on the Link you want to cloak or when entering a new Link and click Yes checkbox on Cloak Link.
Now you can change the page title, description and page image url of that Link. With this option turned on, you can change meta tags or by other words – if you for example paste this Link into facebook, facebook will parse this information that you have set here instead of data from the default clicker meta tags from your default target URL.