Working on dynamic ads is always a balancing advertised content with user experience.
As dynamic banners adapt and deliver a personalised content to each user it is important to make this process in an efficient way, where all creatives, functionality and interaction need to be done in less intrusive and disruptive ways for the audience. Sometimes amount of content pulled from the feed is affecting proportions of overall ad layout, therefore it is quite important to find a perfect balance of all textual and technical parts in layout.
1. Content hierarchy
As user will get a targeted message it is important to display this in a digestive way.
give a bigger proportion of space for image as it will attract a user attention;
animate a frames transition to emphasise on the product;
place an offer and CTA on the same level to motivate for action.
Help users navigate among the offers and give him control over actions.