People on a phone and people on a laptop often want different things. Device targeting lets one short link send mobile visitors one place and desktop visitors another. The classic use case is app install: phones go to the App Store or Google Play, laptops go to your website.
Geo targeting lets one short link behave differently depending on where the visitor is. A single link teilen.bio/buy can send German visitors to your .de store, UK visitors to your .co.uk store, and everyone else to the global page. One link in your campaign, many correct destinations.
A short link is also a sensor. Every time someone opens it, teilen.bio records what happened — and turns those events into a dashboard you can actually use. You stop guessing and start seeing.
A plain black QR code works, but it looks like an afterthought. A designed QR code — with your logo in the centre, brand colours and a frame — looks intentional and gets scanned more often. The trick is doing it without breaking scan reliability.
There are two kinds of QR code and the difference matters once you have printed them. A static QR code encodes the destination URL directly — once printed, it is fixed forever. A dynamic QR code encodes a short link from teilen.bio, and that short link can be redirected and tracked.
