300x50 Mobile Banner
Build your brand with premium display banners on mobile. These ads deliver a richer experience to the user than traditional standard banners. They can include video, interactive content, dynamic data and expansion to offer more real estate.
Deliverables
| Ad components | File type | Dimensions | Max file size |
|---|---|---|---|
| Initial File Load | HTML, CSS, JS, JPG, PNG, SVG | 600 x 100 | 50 KB |
| Host-Initiated Subload | HTML, CSS, JS, JPG, PNG, SVG | 600 x 100 | 100 KB |
| Host-Initiated Video | MP4 and WebM | 600 x 100 | 1.1 MB |
| User-Initiated File Load | HTML, CSS, JS, JPG, PNG, SVG and/or MP4 and WebM | 600 x 100 | 2.2 MB |
| Expandable File Load - Portrait | HTML, CSS, JS, JPG, PNG, SVG and/or MP4 and WebM | 640 x 1136 | 2.2 MB |
| Expandable File Load - Landscape | HTML, CSS, JS, JPG, PNG, SVG and/or MP4 and WebM | 600 x 100 | 50 KB |
| Backup/Static Image | JPG or PNG | 300 x 50 | 150 KB |
Available Features
The following companies have been approved to verify and/or attribute App Install Campaigns:
- Adjust

- AppsFlyer

- Apsalar (Singular)

- Kochava (Native campaigns only)
General
- Served via 300x50 ad call
- Displayed ad dimensions are in retina size
Screen Support
- Mobile
Animation
Autoplay: 15 seconds max
Back-up Static
- Required for instances when the user's browser does not support creative functionality (e.g., HTML5, JavaScript).
- 3rd Party served ad tags are responsible for delivering the back-up image experience.
Retina Assets
Recommended
Ad Vendor
Ads must be site served or served by an approved vendor.
3rd Party Ad Tags & Trackers
Approved 3rd party vendors are allowed to serve select ads. To find out which ad formats are approved to serve via 3rd party, reach out to your Sales POC.
Approved 3rd party vendor trackers (e.g. click, impression, etc.) are allowed across ad formats.
For a list of approved 3rd party vendors, please visit the 3rd Party Vendor List.
Ad Choices
Display Ads have an Ad Choices linkable icon or graphic with "AdChoices" label. Read about AdChoices for more information.
Ad Policies & Guidelines
Ads must comply with Global Yahoo Advertising Policies.
HTML5 Guidelines
HTML5 ad specifications must follow HTML5 Guidelines.
SSL Compliance
Ads & 3rd party vendors must be secure and SSL compliant.
Creative Submission Timelines
Refer to Creative Submission Guidelines for ad design & build SLAs.