Author's Toolbox makes tatb.link short links in two places.
Form short links
Every published form in Form Builder gets its own short link automatically, and it always opens that form. You manage it from the form's Short link dialog, which is also where you'll find the form's QR code and detailed stats. These links don't appear in Link Shortener.
Link Shortener links
Link Shortener is for everything else: any web address you want to share, such as a book's retailer page, your website, a preorder page or a newsletter sign-up hosted elsewhere. You create these yourself, and they're listed in Link Shortener with a click count for each one.
Which should I use?
- Sharing a form you built in Form Builder: use the form's own short link.
- Sharing anything else: use Link Shortener.
QR codes and stats
Link Shortener shows a total click count for each link. It doesn't make QR codes or show breakdowns by day, country or source; those are only in a form's Short link dialog.
Names are shared
Both kinds of link use the same tatb.link names, so a name used by one of your forms can't also be used in Link Shortener, and the other way round.