A creative or an ad is a marketing message that you want to convey to your users. You can choose from a wide range of sophisticated rich media ads like interstitials, expandables, video ads, simple banners, or text creatives. We recommended having multiple creatives for a proposition, as this helps in optimizing your marketing message based on the demand generated per creative.

These are some creative guidelines that you need to follow:

• Text creatives should have a text message, a 40 characters limit, and should adhere to our content guidelines.
• The banner creative formats are compliant to the Mobile Marketing Association (MMA) guidelines. The banners should be less than 100 KB in size and should of JPG, GIF, or PNG formats.
• For HTML5 rich media ads, contact an InMobi representative.

For creative specs and guidelines by the MMA, please see here.