Responsive Search Ads
Responsive search ads in the Search network allow you to set between 3-15 unique ad headlines (a.k.a. "titles") and 2-4 ad descriptions within a single ad. From there, Bing will select the most relevant headline and description combination for each given query and corresponding search user. By allowing Bing AI to select the most relevant headline and description for each query, we ensure that the right message lands for each of your potential customers, at the right time, across all possible intent signals.
The responsive ads shown to users appear identical to expanded text ads i.e., up to 3 headlines (title parts via expanded text ads) and 2 descriptions (text parts via expanded text ads). However, depending on the screen size, your ad may show without the third headline or second description.
Responsive search ads can only be created in Search campaigns where the AdGroupType is set to "SearchStandard". If the AdGroupType is set to "SearchDynamic", then the ad group does not support responsive search ads.
Bulk API for Responsive Search Ads
The Responsive Search Ad Bulk record is available for managing responsive search ads i.e., you can upload or download data in this format.