How do I write Google Ads copy?

Google Ads copy today means responsive search ads, or RSAs. Instead of writing one fixed ad, you supply up to 15 headlines and 4 descriptions, and Google mixes them into combinations and serves whichever performs best for each query. That changes how you write. Your job is no longer to craft one perfect ad, it is to give Google a strong, varied set of building blocks that work in any combination. Weak or repetitive assets limit how well the system can perform, so variety and quality both matter.

Relevance wins the click. The single most effective tactic is mirroring the user's search term in your headlines. If someone searches for CRM software for small business and your headline says exactly that, you signal an instant match and your click-through rate climbs. Pin one or two headlines to your main keyword when it makes sense, but leave most unpinned so Google can optimize. Each headline gets 30 characters and each description 90, so every word has to earn its place. No filler, no vague claims.

Lead with benefits, then back them with proof and specifics. People do not click features, they click outcomes. Save 10 hours a week beats Advanced automation engine. Then make it believable with concrete proof: numbers, guarantees, ratings, or named results. Trusted by 2,000 EU businesses or 14-day free trial, no card carries more weight than generic adjectives like best or leading. Specificity is what separates an ad that gets ignored from one that gets clicked, because it feels real rather than written by a template.

Cover the full set of persuasion angles across your headlines so Google has range to test. Include the core benefit, a unique selling point, social proof, an offer or incentive, urgency where it is genuine, and at least two clear calls to action like Get a Free Quote or Start Your Trial. Use the description lines to expand on the value, handle objections (free shipping, cancel anytime, no setup fee), and reinforce the CTA. Ad extensions (sitelinks, callouts, structured snippets) add free real estate and lift CTR, so always fill them in.

The ad is only half the conversion. Message match between the ad and the landing page is what turns a click into a customer. If your ad promises 20% off your first order, that offer must be visible the moment the page loads, not buried or absent. A mismatch tanks your conversion rate and your Quality Score at the same time, which raises your CPC. Think of the ad and the page as one continuous message: the ad makes a promise, the page keeps it immediately and obviously.

Writing copy is not a one-time task. RSAs report an Ad Strength rating (poor to excellent) based on how many distinct, relevant assets you provide; aim for Good or Excellent without sacrificing message quality just to chase the label. More importantly, review the asset performance ratings over time. Google labels each headline and description as Low, Good, or Best. Cut the low performers, write new variations of the best ones, and keep iterating. Copy that converts is the result of disciplined testing, not a single clever line written once.