Glossary
What are smart banners?
Smart banners are adaptive banners shown on mobile websites that detect the user's device and app state, then either deep link into the installed app or send them to the app store.
What makes them smart
A conventional banner shows the same thing to everyone. A smart banner branches on context before it renders.
It detects the platform, whether the app is already installed, and where in the site the user currently is. An installed user is deep linked straight to the matching in-app screen; a user without the app goes to the correct store listing, ideally carrying the destination so the app opens in the right place after install.
Why context detection is the whole value
Get it wrong and the banner is worse than nothing. Sending an installed user to the app store is a dead end that suggests the product does not recognise its own customers. Sending a desktop user to a mobile store listing is simply broken.
The subtler failure is losing the destination. A user reading a specific product page who taps through and lands on a generic app home screen has been given more friction, not less — they now have to find the thing they were already looking at.
Deferred deep linking is what preserves it across the install, and it is the part most implementations skip because it requires attribution infrastructure rather than a snippet.
Where they fit
- High-intent pages — a product, a booking, a saved item — where the app genuinely offers a better experience.
- Not on the homepage, where there is no destination to preserve and the banner is pure interruption.
- Dismissible, and remembered. A user who declines should not be asked on every page.
- Measured against the web conversion they displace, not only on app installs — pushing a ready-to-buy user into an install flow frequently loses the sale.
Common questions
Do smart banners hurt web conversion?
They can, and it is the most common unmeasured cost. Interrupting a user who was about to convert on the web with an install prompt trades a certain conversion for an uncertain one — worth testing rather than assuming.
Are native OS smart banners enough?
They are simple and free, and they generally do not support deferred deep linking or custom targeting. Where preserving the destination across an install matters, a third-party implementation is usually required.
More in ad formats and creative
The shapes an ad takes, and where it sits.