Yahoo Advertising Native Stream (Yahoo Native Network) ads are still images, up to 2 MB per file, delivered as JPG, PNG, or GIF. They run in the Native placements in Yahoo's Native Network feed placement on Yahoo Advertising. Use these requirements to brief designers, validate uploads, and avoid creative rejections in Yahoo Advertising's ad manager.
| Orientation | any |
|---|---|
| Max file size | 2 MB |
| File types | JPG, PNG, GIF |
Native Ad Guidelines: A comprehensive set of guidelines and deliverables can be found here (DSP login required). | Headlines and Text Guidelines: The headline and text must be spelled correctly and use proper grammar and punctuation. The headline and text must accurately represent the product and offering and be relevant to the landing page. He | Image Guidelines: Image must not be blurry or pixelated. Use the highest resolution possible for the sizing. Image size must be at least 2.5 MB in size with a minimum width of 600px and length of 400px to serve all pla | Image: Description length (optional): 150 characters and below is best, Maximum 250 characters The description length presented depends on the placement. If truncated, the description will end in an ellipsis | Main Image: Size : 1920x1080 (16:9) (Required) Image file : 5MB maximum File type : JPEG (preferred), BMP, PNG, WBMP,...
Official source: https://adspecs.yahooinc.com/format/native-native-stream