Slobodan Jelisavac
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RSA Guide: Responsive Search Ads Framework That Actually Works [2026]

Blog |Google Ads|2026-03-14|14 min

Google Ads · 2026-03-14 · 14 min

TL;DR

Responsive Search Ads are the only text ad format in Google Ads. The key to success is not 15 headlines — it is 7-8 precisely distributed by role. This guide gives you the exact framework I use on client accounts.

7-8

headlines, not 15

336

combinations (enough)

59%

use AI for ad copy

7

headline types

Why the RSA Format Dominates in 2026

Since June 2022, Responsive Search Ads have been the only text ad type you can create in Google Ads. Expanded Text Ads (ETAs) no longer exist. Every Search ad you write today is an RSA.

The problem? Most advertisers use RSAs incorrectly. They fill all 15 headlines because Google suggests it, give no thought to angle distribution, then wonder why their Ad Strength reads "Excellent" whilst CTR is below average.

According to the State of PPC 2026 report (1,306 respondents), 59% of PPC professionals now use AI to write ad copy — up from 42% two years ago. But AI without a framework produces generic copy. And generic copy in RSAs means your ad blends into every other result on the page.

From my experience

After managing Google Ads accounts across eCommerce, Lead Gen, and local services — RSAs with 7-8 well-distributed headlines consistently outperform RSAs with 15 headlines on both CTR and conversions. The reason is mathematics, not opinion.

In this guide you will get the exact framework I use on client accounts: how many headlines to write, which type goes in which slot, how to adapt tone to audience temperature, and how to test and iterate.

What Are Responsive Search Ads and How They Work

Responsive Search Ads are the ad format in Google Search campaigns where you input multiple headlines (up to 15) and descriptions (up to 4), and Google's machine learning automatically combines and serves the combinations that are most relevant for each individual searcher.

What you give Google

  • Up to 15 headlines — each up to 30 characters
  • Up to 4 descriptions — each up to 90 characters
  • Final URL — your landing page
  • Display path — shown URL (2 fields x 15 characters)

What Google does with it

Google shows 3 headlines + 2 descriptions in each ad impression. It combines them based on signals: keyword, device, location, time of day, user history. The goal: find the combination with the highest probability of a click and conversion.

The key rule

Every headline must make sense alongside any other headline. Google will combine headline 1 with headline 8 and headline 12 — if two headlines say the same thing or contradict each other, the ad loses quality.

Why 7-8 Headlines, Not 15

This is the most important concept in the entire guide. Google allows 15 headlines, but that does not mean you should use all 15.

The reason is mathematical. Google picks 3 of your headlines for each impression. The number of possible combinations depends on how many headlines you have:

No. of headlines3-headline combinationsMin. impressions to learnStatus
7210~21,000Optimal
8336~33,600Optimal
10720~72,000Too many
152,730~273,000Data poverty

The calculation: each combination needs a minimum of ~100 impressions for Google to evaluate its potential. With 15 headlines, you need 273,000 impressions before the algorithm has sufficient data. With 8 headlines — only 33,600.

The rule: More headlines = more combinations = less data per combination = slower learning = worse results.

This does not mean you should never use 15 headlines. If your account generates 100,000+ impressions per month per ad group, you can afford more. But for most accounts — 7-8 headlines is the sweet spot.

7 Headline Types That Cover Everything

Instead of writing random headlines and hoping Google finds a good combination, use angle-based slot distribution. Each headline has a clear role — and together they cover the complete persuasion journey.

H1

Relevance Anchor

Signal that the ad is relevant to the search query.

Examples:

  • "HR Software for SMEs"
  • "Emergency Boiler Repair London"
  • DKI: {KeyWord:Anti-Ageing Skincare}
H2

Value Proposition

Your core offer plus the primary benefit.

Examples:

  • "Dermatologist-Tested Formulas"
  • "More Leads, Lower Cost Per Click"
  • "All-in-One Platform for Teams"
H3

USP / Benefit

Why you are different from the competition.

Examples:

  • "Results in 30 Days or Your Money Back"
  • "No Contract — Cancel Anytime"
  • "Engineer On-Site Within 2 Hours"
H4

Social Proof

Trust and credibility signals.

Examples:

  • "Trusted by 15,000+ UK Customers"
  • "4.9/5 Stars on Trustpilot"
  • "Which? Recommended Provider"
H5

Risk Removal

Remove the barrier to taking action.

Examples:

  • "Free 14-Day Trial"
  • "30-Day Money-Back Guarantee"
  • "No Win No Fee — Zero Upfront Cost"
H6

Call-to-Action

The clear action you want them to take.

Examples:

  • "Request a Free Audit Today"
  • "Start Your Free Trial Now"
  • "Call Us — We're Available 24/7"
H7

Lead Angle x2 (variable)

Double down on your strongest signal — which one depends on traffic temperature (more on this in the next section). For cold traffic: a second Problem/Pain headline. For warm: a second USP. For hot: a second Social Proof.

Why this works

When each headline has a different role, every combination Google serves covers a different persuasive angle. The result: your ad is relevant to a wider range of users and motivations. Instead of 7 variations of the same message — you get 7 complementary messages.

Traffic Temperature Approach — Match Your Tone to the Audience

Not all searchers are the same. Someone searching "what is CRM software" is in a completely different mindset from someone searching "HubSpot pricing UK". Your RSA needs to match that temperature.

TemperatureSearch intentH7 should beCTA tone
ColdResearch, educationProblem/Pain (second variant)"Learn More", "See How It Works"
WarmComparison, evaluationUSP or Value Prop (second variant)"Compare Plans", "Book a Free Demo"
HotPurchase, bookingSocial Proof or Risk Removal (second variant)"Get Started Today", "Order Now"

In practice, this means creating 2-3 RSAs for the same service — one per traffic temperature. All share the same foundation (H1-H6), but H7 and the CTA tone differ.

Practical example — skincare eCommerce

A skincare brand has an ad group for "best anti-ageing serum UK" (hot traffic). H7 becomes a second Social Proof: "Trusted by 15,000+ UK Customers". CTA: "Shop Now — Free Next-Day Delivery Over £50". For the cold query "how does retinol work", H7 becomes Problem/Pain: "Tired of Products That Don't Deliver?", CTA: "See the Science".

How to Write an RSA Step by Step

Here is the exact process I follow on every client account. Four phases, in a clear order.

1
Identify traffic temperature — Review the keywords in the ad group. Are they informational, comparative, or transactional? This determines the tone for H7 and your CTA.
2
Write H1 — Relevance Anchor — Use the keyword or DKI (Dynamic Keyword Insertion). Your default must be strong enough to stand alone. Poor: {KeyWord:Our Products}. Good: {KeyWord:Anti-Ageing Skincare}.
3
Fill H2-H6 following the framework — Value Proposition, USP, Social Proof, Risk Removal, CTA. Each headline up to 30 characters. Each must make sense alongside any other.
4
Add H7 based on temperature — This is your variable slot. Cold traffic gets a second Problem/Pain headline, warm gets a second USP, hot gets a second Social Proof.
5
Write 2-3 descriptions — D1: Problem + Solution (include the keyword). D2: Proof + CTA. D3 (optional): Offer + Urgency — only if a genuine deadline exists.
6
Add extensions (assets) — Minimum: Sitelinks (4+), Callouts (4+), Structured Snippets (2+ headers), Business Name, Logo. Optional: Image, Call, Location, Promotion.
7
Review and launch — Read every headline against every other — do they make sense together? Is anything repeated? Upload, do NOT pin (except for compliance), and wait for approval.

Here is what a completed RSA looks like for a UK skincare eCommerce brand using this framework:

SlotTypeExample Headline
H1Relevance AnchorPremium Anti-Ageing Skincare UK
H2Value PropositionDermatologist-Tested Formulas
H3USP / BenefitVisible Results in 28 Days
H4Social ProofTrusted by 15,000+ UK Customers
H5Risk RemovalFree Next-Day Delivery Over £50
H6Call-to-ActionShop the Full Range Today
H7 (Cold)Problem/PainTired of Products That Don't Work?
H7 (Hot)Urgency / ScarcitySpring Sale — 20% Off This Week

Description Strategy

Headlines attract attention — descriptions close the deal. Google shows 2 descriptions from your 2-4. Each description has up to 90 characters and should expand on the message in the headlines, not repeat it.

D1

Problem + Solution

Validate the user's pain and offer the solution. Include the keyword — Google bolds it.

"Struggling with blocked drains? Our engineers resolve the problem same day with a 12-month guarantee."

D2

Proof + CTA

Build trust with a concrete proof point and close with a clear call to action.

"500+ five-star reviews across London. Call now — engineer on-site within 2 hours, 24/7."

D3

Offer + Urgency (optional)

Use ONLY when there is a genuine deadline. False urgency destroys trust.

"20% off all orders this bank holiday weekend. Limited stock — order by Sunday midnight."

Pinning — Yes or No?

Pinning lets you "lock" a specific headline to position 1, 2, or 3. It sounds useful, but in 90% of cases it hurts performance.

The rule: Default = DO NOT PIN. Pinning restricts Google's optimisation and reduces the number of combinations the algorithm can test.

When pinning is justified

  • Regulatory requirements — financial services, healthcare (disclaimer must be visible)
  • Brand guidelines — brand name must appear in headline 1
  • Critical relevance — keyword MUST appear in headline 1 for a specific campaign

When it is NOT justified

  • "I want this headline to show more often" — let Google optimise
  • "This is my best headline" — if it is, Google will favour it automatically
  • "Every headline fixed to an exact position" — this is the ETA approach, not RSA

Most Common RSA Mistakes and How to Avoid Them

Mistake: All 15 headline slots filled

Fix:

Use 7-8 headlines. More means data poverty. Each additional headline reduces the volume of data per combination, slowing the algorithm's learning.

Mistake: All headlines say the same thing

Fix:

Use angle-based distribution. Each headline has a different role: relevance, benefit, proof, risk removal, call to action. 7 angles = 7 reasons to click.

Mistake: Descriptions repeat the headlines

Fix:

Descriptions should EXPAND the message. The headline says "Trusted by 15,000+ UK Customers", the description explains: "Join brands that reduced CPA by 40% within their first 90 days."

Mistake: Everything pinned to positions

Fix:

Only pin when regulation requires it. Otherwise, let Google optimise. Over-pinning converts your RSA into an ETA — you lose all the benefits of automatic combination.

Mistake: Using Ad Strength as your only metric

Fix:

Ad Strength is Google's input signal, not a performance metric. Aim for "Good" or better, but measure success by CTR, conversions, and CPA — not the score shown in the interface.

Mistake: Fake urgency in descriptions

Fix:

"Today only!" that runs all year destroys trust. Use D3 (urgency) ONLY when you have a genuine deadline. Otherwise — skip it and stick to 2 descriptions.

RSA Testing — The Iteration Loop

Writing the RSA is only the beginning. Real results come through systematic testing and iteration. I use a four-step cycle repeated every 2-8 weeks.

1
Templatise — Document which angle sits in which slot. Keep a record of every RSA in a spreadsheet with slot + angle + headline text. This is your playbook.
2
Aggregate — Collect the data. Look at: impressions per headline, CTR per combination (Asset report in Google Ads), conversions per ad variant.
3
Diagnose — Classify each headline into one of 4 quadrants:
QuadrantImpressionsPerformanceAction
ChampionsHighHigh CTR/ConvKeep and learn from them
Hidden GemsLowHigh CTR/ConvDuplicate the angle in a new RSA
Silent KillersHighLow CTR/ConvReplace — consuming impressions without results
TrashLowLow CTR/ConvRemove and write a new headline
4
Iterate — Based on your diagnosis: replace Trash and Silent Killers, scale Champions and Hidden Gems. Create a new RSA variant and launch it. Repeat the cycle in 2-4 weeks.

How long to wait before analysing

Minimum 2 weeks and 1,000+ impressions per RSA variant. Without that, the data is unreliable. For lower-volume accounts, wait 4 weeks. Never change an RSA within the first 7 days — give Google time for its learning period.

Frequently Asked Questions About RSA

How many RSAs should I have per ad group?+
Google recommends a minimum of 1 RSA per ad group, with 2-3 being optimal. Two RSAs allow you to A/B test different approaches (for example, one focused on price, another on quality). Do not go above 3 — you fragment your data.
Does an "Excellent" Ad Strength guarantee better results?+
No. Ad Strength is Google's input signal that measures the variety and relevance of your headlines — it is not a performance metric. An RSA with "Good" Ad Strength and precise angle-based headlines will often outperform an "Excellent" RSA built from 15 generic headlines. Aim for "Good" as your minimum, but measure success by CTR and conversions.
Should I use AI to write RSA headlines?+
Yes, but with a framework. 59% of PPC professionals already use LLMs for ad copy (State of PPC 2026). The problem arises when AI writes without structure — you end up with 15 variations of the same message. Use angle-based slot distribution as your brief for AI: "Write H1 (Relevance Anchor, 30 characters), H2 (Value Proposition)..." and so on.
How frequently should I update my RSAs?+
Use the Iteration Loop: every 2-8 weeks analyse your data, identify Champions and Silent Killers, and create a new iteration. Do not update an RSA before you have at least 1,000 impressions. Frequent changes reset the learning period.
What if I do not have enough impressions for 7-8 headlines?+
For ad groups receiving fewer than 5,000 impressions per month, use 5-6 headlines. Fewer headlines mean fewer combinations mean faster learning. Five precise headlines are better than 8 of which 3 are weak.
How does RSA work alongside Smart Bidding?+
RSA and Smart Bidding are complementary. Smart Bidding (tCPA, tROAS) optimises how much you pay per click, whilst RSA optimises which ad is served. According to State of PPC 2026, tROAS and tCPA are the most widely used and highest-rated bid strategies. The combination: Smart Bidding + angle-based RSA = automation with structure.
Does RSA replace the need for A/B testing?+
No. RSA optimises combinations within a single ad. A/B testing (Google Ads Experiments) tests different approaches — for example, an RSA focused on price versus an RSA focused on quality. Both are needed for complete optimisation.

Conclusion

RSA is not "fill 15 headlines and wait". It is a systematic framework where each headline has a clear role, where tone follows traffic temperature, and where results improve through iteration — not guesswork.

Key takeaways:

  • 7-8 headlines — the mathematics is clear, data poverty is real
  • Angle-based distribution — each headline covers a different persuasive angle
  • Traffic Temperature — adapt H7 and your CTA to match search intent
  • Do not pin — unless regulation requires it
  • Iteration Loop — test, diagnose, iterate every 2-8 weeks

Want someone to write RSAs that actually convert?

I manage Google Ads accounts for eCommerce, Lead Gen, and local businesses across the UK. Free audit of your account — including a full analysis of your existing RSAs.

Request a free audit

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Last updated: March 2026 · Author: Slobodan Jelisavac, Google Ads Consultant · Reading time: ~14 min