Write Google Ads and Meta Ads Copy

Digital advertising demands surgical copywriting

In paid advertising, every word counts in the most literal sense: you pay for every click and every impression. A poorly phrased headline or a weak call to action (CTA) can drive up your acquisition costs without you understanding why—the campaign runs, the budget drains, but conversions never arrive. Ad copywriting is therefore an exercise in precision where volume makes the difference: the more variations you test, the faster you find the ones that perform. ChatGPT gives you exactly this capability, quickly generating dozens of variants optimized for each platform and audience.

Google Ads: Mastering Search and Display

On the Search Network, the standard format is the Responsive Search Ad (RSA): you provide 3 to 15 headlines of up to 30 characters each and 2 to 4 descriptions of up to 90 characters each, and Google dynamically assembles the best-performing combinations. Writing fifteen relevant thirty-character headlines by hand is tedious—this is the ideal use case for ChatGPT, provided you impose a distribution of angles rather than letting it produce fifteen variations of the same idea:

Create Google Ads RSA ad variations for:
- Product/service: [description]
- Primary keyword: [keyword]
- Landing page: [URL]
- Value proposition: [USP]

Generate:
- 15 headlines — max 30 characters each
  - 5 with the exact keyword
  - 5 with a customer benefit
  - 3 with a number or proof point
  - 2 with a CTA — immediate action
- 4 descriptions — max 90 characters each
  - 2 benefit-oriented
  - 1 with social proof
  - 1 with CTA and urgency

This distribution isn’t arbitrary: headlines with the exact keyword reinforce relevance perceived by both Google and the user who just typed that keyword, benefit and proof headlines fuel persuasion, and CTAs drive the click. Always check generated lengths—ChatGPT sometimes exceeds the character limit, and a headline truncated mid-promise hurts the ad.

For visual formats on Display and YouTube, the image grabs attention but the text drives the decision. ChatGPT generates the accompanying text: one to five short headlines of 30 characters for the immediate hook, one long headline of 90 characters that expands on the value proposition, one to five descriptions that complement the headline and encourage action, and even scripts for YouTube bumper ads—non-skippable videos of six seconds or less. This is a formidable writing exercise where every word must earn its place.

Don’t forget ad components—formerly extensions. These are often neglected, yet they expand your ad in search results and often secure more clicks. Adding them costs nothing extra, and Google recommends using at least four types. Have ChatGPT generate your sitelinks with descriptions, your callouts—short phrases highlighting your advantages—and your structured snippets, which list categories of your products or services.

Meta Ads: Facebook and Instagram

Meta offers a variety of formats, each with its own text constraints you must know before writing. The single-image ad combines primary text, truncated after a few lines by ”… see more,” with a short headline and description; Meta’s ad formats guide specifies recommended lengths per placement. Video follows the same text structure but adds a script. Carousel ads require a headline and description per card, and Collection ads need a main headline plus a cover image. Writing without these constraints in mind guarantees your messages will be truncated in the worst possible spot.

Create 5 Meta Ads variations for:
- Objective: [awareness / traffic / conversion / leads]
- Product: [description]
- Target: [persona with interests and behaviors]
- Placement: [feed / Stories / Reels]

For each variation:
- Primary text — 3 versions: short (1 line), medium (3 lines), long (5 lines)
- Headline and description — lengths recommended by Meta for this placement
- Recommended CTA from Meta options
- Emotional angle used — fear, curiosity, aspiration, urgency, social proof

Placement deserves special attention because a message that performs in the feed can fail completely in Stories. In the feed, users are in reading mode: longer, argumentative text with moderate emojis has time to convince. In Stories, everything scrolls by in seconds: the message must be ultra-short, the visual dominant, and the text overlaid on screen. In Reels, the golden rule is mimicry—a native hook and content that looks organic, because an ad that “smells” like an ad gets skipped immediately. Always specify your target placement in your prompts.

Cross-channel ad copywriting rules

Regardless of the channel, the same principles separate ads that convert from those that burn budget. Specificity first: “47% more leads” stops the eye where “more leads” slides by unnoticed—provided the number is true and demonstrable. Customer benefit next: talk about what the prospect gains, not what the product does. Urgency only if legitimate—actually limited stock, actually dated offers—because false urgency destroys trust by the second exposure. Proof in all forms: numbers, testimonials, certifications. And an explicit CTA that says exactly what the prospect must do, without making them guess.

Your turn

Your first campaign.

1. Choose a platform, an objective, your target audience, and your budget
2. Generate variations using the prompts above
3. Select the top 5 variations
4. Launch as an A/B test with a limited budget

This restricted budget isn’t timidity: the first campaign serves to learn which formulations resonate with your audience, not to be profitable on day one. You’ll invest more once you’ve identified the winners. Finally, verify every generated length in the platform interface, which is the source of truth.

Official sources: About responsive search ads on the Search Network · Create a responsive display ad · About assets · About video ad formats (Google Ads Help) · Prompting (ChatGPT documentation)

Key takeaways

• Each platform has its own character limits and specific formats
• Generate more variations than you need—then select the best
• Google Ads components expand your ad at no extra cost and often drive more clicks
• Always adapt the message to the placement—feed, Stories, Reels
• Specificity and social proof are the most powerful levers