[FEATURE] Suggested image resolution in campaign creation could be improved

[kayrocesar]

Is your feature request related to a problem? Please describe.
I am always frustrated when I am creating a campaign and when it comes time to insert or edit campaign images the suggested resolutions appear in a confusing way . For example, suggesting a minimum resolution or putting only the resolution without further explanation as shown in the image below:

It is worth pointing out that images of smaller resolutions is accepted without major problems for main images , even though there is information that the image should be at least 500x400.

For example, we tested a 126x100 main image and it was accepted without any problems, even though it was stated that the resolution should be at least 500x400.

Describe the solution you'd like

Explain clearly the suggestions of resolution for the type of image to be inserted

Describe alternatives you've considered
Add some kind of validation for the image resolution