Ever caught yourself piling up Responsive Search Ads (RSAs) in an ad group, thinking volume equals victory? It’s a common instinct, but one that can backfire as it confuses Google’s algorithm, fragments your data, and drags down learning speed.

Here’s why you should go for only one RSA per ad group.

The core tactic

Stick to one RSA per ad group. This provides Google with the best data to work with and makes it easier to find the strongest combinations of headlines and descriptions. Simultaneously, optimization becomes simpler, and you ensure a faster learning process.

Reasons to stick to one RSA

I often see multiple RSAs created within the same ad group. The idea might be that more is better, but in practice, they just end up stealing impressions from each other and confusing the algorithm. Here are my primary reasons:

• Consolidated learning: When you only have one RSA, Google finds it much easier to discover the best combination of headlines and descriptions.
• Better performance optimisation: With room for up to 15 headlines and 4 descriptions, a single RSA test can handle plenty, though 5 headlines and 2 descriptions often suffice.
• More value from your data: When all performance is consolidated in one place, the algorithm learns faster. If you spread it across multiple RSAs, each ad gets too little data to work with, and it takes longer to figure out what works and what doesn’t.
• Easier management: Evaluating and tweaking one RSA cuts clutter and saves time on routine tasks

And then, of course, there’s the obvious: Google itself recommends sticking to one RSA per ad group because it aligns with how their machine learning operates.

How to optimize that one RSA efficiently (using Optmyzr’s RSA tool)

Once you commit to a single RSA per ad group, the real work begins: keeping that RSA strong, relevant, and improving continuously. This is where Optmyzr’s Ad Text Optimization (RSA) can really support your single-RSA strategy.

Break down RSA performance at the asset level

See which headlines or descriptions perform best, even when reused across multiple ads. You can also view:

• Performance ratings
• Asset impression counts
• Whether assets are pinned
• Asset strength

Optimize individual headlines & descriptions in bulk

With one RSA per ad group, you’ll often reuse strong assets across the account. Optmyzr helps by allowing:

• Bulk editing of assets
• Cross-RSA text consistency
• Updating shared components everywhere they’re used

This naturally supports the consolidated-structure strategy.

Use AI-powered suggestions to improve weak assets

The tool suggests:

• New headline ideas
• Alternate descriptions
• Complete RSA drafts

Perfect for refreshing a single RSA without blowing up your structure.

Manage pinning strategically

Since pinning can heavily influence performance, Optmyzr lets you:

• Pin/unpin assets directly
• Filter for pinned components
• Compare performance between pinned vs. unpinned versions

Ideal for testing messaging priority inside your one RSA.

Use Find & Replace for fast, account-wide fixes

If your one RSA approach relies on consistent messaging, bulk updates like:

• Updating outdated offers
• Switching brand phrasing
• Fixing compliance issues

…can be done across all relevant assets instantly.

Preview, validate & upload changes safely

Bulk editing can feel risky. Optmyzr lets you:

• Preview all changes
• Download changes via CSV for approval
• Upload final edits only when ready

Make your single RSA strategy stronger with Optmyzr

Running one RSA per ad group simplifies your structure, improves learning speed, and makes Google’s machine learning work harder for you. But the key to making this strategy perform isn’t just the setup; it’s how well you continuously optimize the assets inside that one RSA.

That’s where tools like Optmyzr’s Ad Text Optimization (RSA) really shine: they help you refine, test, and scale winning creative combinations faster and with complete visibility.

Curious how it can help? Test it out in our fully functional 14-day free trial today!

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Morten Kristoffersen is a Senior PPC Specialist at SavvyRevenue, where he helps eCommerce brands grow through data-driven Google Ads strategies and smart account optimization.

With a background in digital marketing and several years of experience at agencies like LAZZAWEB, Morten has developed a strong focus on scaling campaigns efficiently while keeping profitability top of mind.

This article is a reflection of the author’s experiences and opinions. Optmyzr believes that there are many ways to win in digital advertising, and is committed to presenting a diverse range of ideas and approaches.