Key to responsive HTML
HTML is always suppose to be responsive, this means that when someone adjusts the size of the website where the creative is being shown, the advert will adapt to suit. The code needs to be developed for this work (by your agency).
If it doesn't work, make sure to check the code first - here's a guide on the topic: www.preview.adnami.io/responsiveguide
Getting started with responsive HTML
For more on getting started with responsive HTML check out our new Guide to Responsive HTML - covering useful tips, information and advice to help you get started with your responsive creative builds!