Ad Formats
Responsive Ad Unit — Definition & Explanation
An ad placement that automatically adjusts its dimensions based on the screen size and device type, ensuring optimal display across desktop, tablet, and mobile devices without requiring separate ad tags for each size.
How Responsive Ad Unit Works
Responsive ad units use fluid sizing (%, vw) and JavaScript to detect the container width and request appropriately sized creatives. Google Ad Manager and most SSPs support responsive ad size declarations in bid requests.
Why Responsive Ad Unit Matters for Publishers
Responsive units simplify ad management and ensure publishers maximize revenue across all devices without maintaining separate ad tags for each breakpoint.
Frequently Asked Questions
Are responsive ad units better than fixed-size units?
For mobile, responsive units generally perform better by ensuring ads fill the available screen width. For desktop premium placements, fixed large formats may attract higher CPMs.
What sizes do responsive units serve?
Responsive units typically serve IAB standard sizes that fit the container: 300x250, 320x50, 728x90, 970x250, and fluid formats.
Does Stellor Media support responsive ad units?
Yes. Stellor's Prebid configuration supports responsive ad sizes and fluid formats across all device types.
Related Terms
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