Responsive Search Ads (RSAs) in Google Ads: How Many Can You Use?

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 adsGoogle's system rotates combinations based on search intent, device, and performanceAsset-level reporting shows which messages resonateBest practices include:Grouping related keywords in tightly themed ad groupsWriting unique, varied headlines and descriptionsHighlighting unique selling points like discounts or fast shippingUsing ad extensions for extra visibilityMonitoring performance and adjusting underperforming assetsRSAs 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