Responsive Search Ads (RSAs) help advertisers reach the right people with the right message—by allowing up to 15 headlines and 4 descriptions per ad. Google then tests combinations to find what works best. But how many RSAs can you have in a single ad group?
The answer: 3 active RSAs per ad group. Google limits this to promote quality over quantity. With fewer ads, machine learning can optimize faster and more effectively.
Each RSA must include at least 3 headlines and 2 descriptions, but you can use up to 15 and 4 respectively. Headlines are capped at 30 characters each, and descriptions at 90.
Why it matters:
You can test many variations without building multiple separate ads
Google's system rotates combinations based on search intent, device, and performance
Asset-level reporting shows which messages resonate
Best practices include:
Grouping related keywords in tightly themed ad groups
Writing unique, varied headlines and descriptions
Highlighting unique selling points like discounts or fast shipping
Using ad extensions for extra visibility
Monitoring performance and adjusting underperforming assets
RSAs are ideal for campaigns that need dynamic messaging, broad visibility, or fast optimization without manual split testing. Just remember the rule: only 3 responsive search ads per ad group—so make them count.
https://agrowth.io/blogs/google-ads/how-many-responsive-search-ads-in-google-ads
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