Why use this setting?
Restricting campaigns by screen width and operating system ensures your message appears only where it fits best. Some campaigns are designed for large displays, desktop layouts, or specific device types, while others work better on mobile. By defining a minimum or maximum screen width, you can make sure your campaign looks as intended and doesn’t interfere with smaller or differently structured layouts. OS targeting lets you tailor campaigns for iOS, Android, Windows, macOS, or other platforms.
Where it works best?
Use screen-width and OS restrictions whenever the campaign is optimized for a specific device experience:
Large-format popups or banners created for desktop users.
Mobile-only campaigns with compact layouts or mobile-specific offers.
Device-specific messages, such as app downloads for iOS or Android.
Promotions or guides that depend on platform features or supported technology.
What does it solve?
These restrictions prevent visual issues and ensure users always see campaigns that match their device capabilities. It also keeps your UX clean—mobile users won’t be shown oversized desktop creatives, and desktop visitors won’t see campaigns built for narrow screens.
Best practice tip:
Use screen width filters for device-specific or large-format creatives. This keeps your campaigns visually consistent and avoids unexpected layouts on incompatible screens. Combine with OS targeting when your message or CTA depends on the visitor’s platform.