This redirect option allows you to redirect the first click from your visitor to a specific landing page and all other clicks from the same user to other pages. You can access this feature in the moment you create or modify a short tracking link.
When a visitor clicks for the first time a tracking link with this option ON, will be redirect to the URL (landing page) specified in the text-box.
All other (no-unique) clicks will be redirected to the main destination URL (or will follow other redirect rules if applied to this short tracking link)
A visitor is considered unique when there are no other clicks on that link from the same IP address within last 30 minutes.
First (unique) click redirect is useful in many different cases eg.: if you are selling unique clicks and do not want your customer to benefit from additional clicks he is not paying for.