> For the complete documentation index, see [llms.txt](https://docs.admoai.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.admoai.com/getting-started/quickstart/creative.md).
# Creative
A creative is part of an [ad](/getting-started/quickstart/ad.md) (which is combination of a [placement](/getting-started/quickstart/placement.md) and [template](/getting-started/quickstart/template.md)).
{% hint style="warning" %}
Media Validation
Although aspect ratio constraints can be added to image fields when creating the template. We found that it can become messy (Eg. when images are a couple of pixels outside of a certain aspect ratio).
Due to this, we don't enforce a hard validation on uploaded media. However, when requesting an ad, the decision engine will return a media URL conforming to the constraints of the template field.
Eg: An image template field has a constraint of 1:1, but a 16:9 image is uploaded via the ad manager platform. We will accept this but the decision engine will return the media in 1:1 format, cropping the image from the center.\
\
{% endhint %}
---
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