Google Ads copy that converts: RSA headlines, descriptions and CTAs, with examples

How do responsive search ads work?

A responsive search ad, or RSA, is the standard text ad on Google Search. You give Google a set of headlines and descriptions. For each search, Google picks and orders a combination it predicts will perform best. A typical ad shows up to three headlines and two descriptions.

That changes how you write. You are not writing one ad. You are writing parts that get assembled by a machine. Every line has to work next to any other line.

How many headlines should a responsive search ad have?

Google recommends giving as many unique headlines as you can, up to 15, plus all 4 descriptions. More variety gives the system more combinations to test. The key word is unique. Fifteen versions of "Best Plumber in Austin" teach Google nothing.

A practical target is 10 to 15 headlines and 4 descriptions per ad, with one or two RSAs per ad group. If you are short on ideas, the headline groups below will get you there fast.

How do you write Google Ads headlines that convert?

Start from the search. Someone typing "emergency plumber near me" at 11 pm wants speed and trust, not a company history. Write for that person, then cover the other reasons people pick one business over another.

Aim for two or three headlines per group. Use only claims you can prove. If you have 1,200 reviews and 4.9 stars, say so. If you do not, use a different proof point.

Optmyzr calls these results directional, and they come from accounts using its software, not all advertisers. Still, the lesson is useful. You do not have to fill all 30 characters. "Same-Day Repair" can beat a crammed headline.

Headline rules that save money

• Include the main keyword in at least two or three headlines, so the ad looks relevant.
• Put the city or service area in one or two headlines for local services.
• Use numbers people care about: years in business, review count, price, response time.
• Avoid near-duplicates. Google’s editorial policy disallows repetition across assets.
• Skip all caps and stray symbols. Both can get the ad disapproved.

What should Google Ads descriptions say?

Descriptions carry the details headlines cannot fit. Use them to expand the offer, handle the biggest objection and close with a call to action. Each of the four should stand on its own, because any two can show together.

A good set of four for a local service business looks like this:

1. 1The offer: what you do, for whom, and the key benefit.
2. 2The proof: reviews, years, certifications, guarantees.
3. 3The objection: price, timing, financing, or "is it a hassle?"
4. 4The call to action: exactly what happens when they click or call.

Optmyzr’s 2026 study found descriptions of 61 to 70 characters had the best CTR and a lower CPA than descriptions of 81 to 90 characters. Write tight, then stop.

What are good call-to-action phrases for Google Ads?

The best call to action matches what the person is ready to do. "Buy now" works for a $30 product. It does not work for a $15,000 kitchen remodel, where the realistic next step is a quote or a consultation.

Google Ads copy examples by industry

Use these as starting points, not templates to copy. Replace every claim with one that is true for your business. All headlines fit the 30-character limit.

Regulated industries have extra rules. Law firms must follow their state bar’s advertising rules, and healthcare and finance ads face Google policy restrictions. Check before you publish claims like "best" or "guaranteed".

Should you pin headlines in Google Ads?

Pinning forces a headline or description into a fixed position. A headline pinned to position 1 always shows first. Google generally advises against pinning, because it limits the combinations the system can test and can lower ad strength.

There are good reasons to pin, though:

• A legal or compliance line that must appear in every ad.
• A brand name that must lead the ad.
• A message that reads badly in any position but one.

When you pin, pin two or three different options to the same slot, so Google still has something to test. Leave the other slots open.

If your campaign uses AI Max for Search with final URL expansion, note that Google may skip pinned assets when it sends a click to a different, more relevant page. Turn off final URL expansion if pinned text must always show.

Does ad strength matter in Google Ads?

Ad strength rates your RSA from Poor to Excellent based on how many unique, relevant assets you provided. Google says it does not directly affect whether your ad is eligible to serve.

Independent data is less tidy. In Optmyzr’s 2026 study, ads rated Average had the lowest CPA and highest conversion rate, while Excellent ads did worse. The sensible reading: fix Poor ads, because they usually lack variety. Do not rewrite a profitable Good ad just to turn the badge green.

How do you test Google Ads copy?

1. 1Pick one goal metric, usually cost per lead or conversion rate, not CTR.
2. 2Change one idea at a time, for example a price-led message vs a speed-led message.
3. 3Run the new version as a second RSA in the same ad group, or use an ad variation test.
4. 4Wait for enough data. For small budgets, that often means several weeks, not days.
5. 5Check the asset report and combinations report to see which lines Google favors.
6. 6Replace the weakest headlines with new ideas and repeat.

Common Google Ads copy mistakes

• Writing headlines that only make sense in a fixed order.
• Filling every slot with the keyword and nothing else.
• Vague CTAs like "Learn More" or "Click Here".
• Claims you cannot prove, which hurt trust and can break policy.
• Sending every ad to the homepage instead of a matching landing page.
• Judging ads on CTR alone and ignoring lead quality.

Frequently asked questions