> For the complete documentation index, see [llms.txt](https://support.happydemics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.happydemics.com/launch/before-the-set-up/how-to-prepare-my-creative-s/how-to-manage-a-campaign-with-multiple-creatives.md).

# How to manage a campaign with multiple creatives?

It’s common for a media campaign to use several creative assets—each one tailored by product, audience, media type, or distribution area.

### **How to handle multiple creatives**

* If your campaign includes several creative assets, we recommend launching a separate brand lift for each one. This is the only way to accurately compare how well each creative performs.
  * ⚠️ Each creative must reach at least 100,000 unique exposed individuals to be eligible for measurement.
* If you have several static creatives—such as in OOH or display—you can combine them into a single GIF for use in your Happydemics survey. Just keep in mind you won’t be able to compare the results of each individual creative in this setup.
* If your budget doesn’t allow for a separate brand lift per creative, or for creating a GIF of static creatives, we suggest using the original version or the creative that’s been shown most often.

### **Media insertion guidelines**

* Accepted file formats: .png, .jpeg, .jpg, .gif, .mp3, .mp4, .wav
* Videos may be up to 30 seconds long.
* The maximum file size is 1 MB for static images or GIFs and 5 MB for videos.

If you have any questions or need help deciding on the best approach, our team is always here to help!

### 🚀 Related Articles

[Media Channels and formats](/methodology/media-formats-and-targeting-strategies/media-channels-and-formats.md)

[Creative contextualisation](/launch/before-the-set-up/how-to-prepare-my-creative-s/creative-contextualisation.md)

[How to prepare my creative(s)?](/launch/before-the-set-up/how-to-prepare-my-creative-s.md)

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