Responsive Search Ads: How to Write Assets Google Will Actually Serve

You write fifteen headlines, Google shows three, and you never quite know which three did the work. That is the bargain with responsive search ads, and it is the reason so many accounts run search copy that quietly underperforms for years. The format itself is old news. The way you need to write for it is still misunderstood by most of the people writing for it.

Here is what actually moves the numbers, and what you can safely ignore.

Ad Strength is feedback, not a ranking factor

The single most common misunderstanding is that Ad Strength feeds into how your ads rank. It does not. Google says so directly: Ad Strength "isn't used to calculate Ad Rank, Quality Score, or auction wins" and does not determine whether your ad is eligible to serve, according to Google Ads Help. It is a diagnostic that checks whether you have given the system enough relevant, varied material to build ads from.

That does not make it worthless. Google's own data shows advertisers who move Ad Strength from "Poor" to "Excellent" for their responsive search ads and sitelinks see 15% more conversions on average. The rating is not causing the lift. The asset variety behind the rating is. Chase the rating for the right reason and you get the benefit anyway.

The trap is chasing "Excellent" with filler. Fifteen headlines that all say roughly the same thing will nudge the meter without giving the system anything new to test. You have created the appearance of variety, not variety.

Write for combinations, not for one perfect ad

Stop thinking of a responsive search ad as an advert. Think of it as a supply of parts. You get up to 15 headlines and 4 descriptions, and every combination is a live ad that a real person will see.

That changes how you write. Each headline needs to stand alone and to sit sensibly next to any other headline you have written. If headline three only makes sense after headline one, the format will eventually embarrass you.

A few rules worth holding to:

Cover distinct angles, not distinct wordings. Price, speed, proof, guarantee, location, objection handling, the offer itself. If two headlines belong to the same angle, one of them is wasted.

Get the keyword into a single headline. Google's guidance is explicit that a keyword has to be contained entirely within one headline to count towards relevance — splitting it across two does nothing. For keywords too long for the 30-character limit, put them in the 90-character descriptions instead.

Write the boring ones too. Plain, literal headlines that restate the service and the location often outperform the clever ones. You are not writing to be admired. You are writing to be matched.

Pin sparingly, and never in pairs

Pinning locks a headline or description to a position. It has legitimate uses — regulated wording, a legal disclaimer, a brand name that must appear first. It also throttles the number of combinations the system can build, which is the entire point of the format.

Google's advice is to pin one or two essential assets at most, and if you must pin, pin several genuinely different versions to the same position rather than one. Pinning near-identical headlines to the same slot blocks testing and drags your Ad Strength down without buying you anything.

If you inherited an account where every headline is pinned, that is usually the first thing worth undoing. Do it in stages so you can see what happens.

Sitelinks are part of your ad copy now

This one catches people out. Sitelink count is a direct input into Ad Strength for responsive search ads, and Google recommends at least six sitelinks across the account, campaign and ad group levels to reach a "Good" or better rating. Both your own uploaded sitelinks and dynamic sitelinks count.

So an account with three sitelinks bolted on at account level and nothing else is capping its own ad quality before a single headline is written. Sitelinks are also the cheapest real estate in search — they take up space your competitors are not using and they give people a second reason to click.

Read the asset report with appropriate scepticism

Google retired the old performance labels and replaced them with full performance statistics for each asset, available for dates from 5 June 2025 onwards. More data, which is good. It is also easy to over-read.

Google's own guidance on the ad-level asset report says ratio metrics at asset level — CTR, CPC, CPA, ROAS — should be treated as directional only, because an asset never serves in isolation. A headline's CTR is partly the CTR of whatever it happened to be paired with.

The one signal worth acting on without hesitation: assets with zero impressions after several weeks. The system has looked at them and decided they are never the best option. Replace them.

Two ads per ad group is the floor, not the ceiling

Google's figures are modest but consistent. Going from one responsive search ad to two in an ad group produces an average 6.6% increase in conversions at a similar cost per conversion. Adding a third takes you another 3.7%. Small numbers, but you get them for the price of writing copy once.

Two ads with "Good" or "Excellent" Ad Strength per ad group, each pointing at a genuinely relevant landing page, is a sensible baseline for most accounts we take over.

Where the real gains usually are

Be honest about the ceiling here. Ad copy is a multiplier on everything downstream of the click. If your landing page loads slowly, buries the form, or answers a different question from the one the ad implied, better headlines will get you more traffic and roughly the same number of enquiries.

We treat search copy and landing pages as one job for exactly that reason. If you want the ad side handled properly, that is what our Google Ads management covers, and the page it lands on sits under conversion rate optimisation.

If your responsive search ads have not been rewritten since you launched them, that is the cheapest hour of work available to you this month. If you would rather someone else did it, get in touch and we will look at what you are running.