Ad copy is the bridge between a search query and a click. For nonprofits using Ad Grants, it is also one of the most controllable levers in account performance — something you can improve directly, without depending on algorithm changes or website updates. Well-written ad copy lifts click-through rates, improves Quality Scores, and ensures the right people are clicking through to your pages. This guide covers the structure, specs, and writing principles that produce high-performing Ad Grants ads.
Understanding Responsive Search Ads
All Ad Grants search campaigns use Responsive Search Ads (RSAs). Rather than a single fixed ad, an RSA is a pool of headlines and descriptions that Google mixes and matches automatically to find the combinations that perform best for each search query and user.
This has an important implication for how you write: every headline and every description needs to make sense on its own, in any combination. You cannot rely on a specific headline appearing alongside a specific description. Write each asset as a standalone statement that works independently, and trust Google to assemble effective combinations from the pool you provide.
Ad Copy Specifications
Each RSA requires:
- 15 headlines — up to 30 characters each, written in Title Case
- 4 descriptions — up to 90 characters each, written in sentence case
- Display URL path fields — two optional path fields of up to 15 characters each, appended to your domain in the ad
Google will show up to three headlines and two descriptions at a time in any given ad serving. The 15 headlines and 4 descriptions you provide are the full inventory Google draws from.
The in-interface Ad Strength indicator rates your creative on a scale from Poor to Excellent. Aim for Excellent. Google uses this rating as one signal when deciding which ads to serve, and Excellent-rated ads consistently outperform weaker ones. The most common reasons an ad falls short of Excellent are insufficient keyword inclusion in headlines and headlines that are too similar to each other.
Including Keywords in Headlines
The single most important factor for ad relevance scoring is whether your target keywords appear in your headlines. Google evaluates keyword-to-ad congruence as a core component of Quality Score — an ad that visibly reflects what the user searched for earns a higher relevance rating, a better position, and a higher click-through rate.
For each ad group, identify the 3–4 keywords that best represent the theme and include them naturally in at least that many headlines. Write them in Title Case. An ad group targeting food bank volunteer opportunities in Chicago, for example, should have headlines like “Chicago Food Bank Volunteers,” “Volunteer at Our Food Bank,” and “Help Fight Hunger in Chicago” — not a single generic headline repeated with minor variations.
This is one of the reasons ad group keyword limits matter. When an ad group is tightly focused on 15–20 related keywords, writing keyword-inclusive headlines is straightforward. When an ad group spans 60 loosely related terms, including relevant keywords in headlines becomes impossible and relevance scores suffer across the board.
Writing Headlines That Work
Write in Title Case: Every headline should be capitalized as a title — “Donate to Fight Childhood Hunger” not “Donate to fight childhood hunger.” Title Case consistently outperforms sentence case in headline CTR.
Lead with intent: Your strongest headlines should reflect what the searcher is looking for. If someone searches “volunteer opportunities Chicago,” a headline that opens with those words or close variants will outperform a generic organizational tagline.
Include a call to action: At least two to three headlines should contain a direct call to action — “Donate Today,” “Volunteer This Weekend,” “Apply for Services,” “Learn How to Help.” Calls to action drive higher CTR because they tell the user exactly what happens when they click.
Highlight impact and credibility: Use headlines to communicate your organization’s scope, reach, or years of service — “Serving Chicago Since 1987,” “25,000 Families Helped Annually,” “Nationally Recognized Programs.” These build trust and differentiate your ad from generic competitors.
Use your organization name: Include your organization’s name in two to three headlines. Branded headlines reinforce recognition and are particularly important for searches that include your name or closely related terms.
Vary your angles: Google needs variety to test effectively. If all 15 headlines follow the same structure or communicate the same idea, there is nothing to optimize against. Include intent-matching headlines, CTA headlines, impact headlines, and organizational credibility headlines — different angles for different users and queries.
Writing Descriptions That Convert
Descriptions give you more space — up to 90 characters — to provide context, reinforce your call to action, and overcome hesitation. Two descriptions will show at a time alongside up to three headlines.
Write in sentence case: Descriptions follow sentence capitalization, not Title Case. “We’ve helped over 10,000 families access free food assistance in the Chicago area. Apply today.” Not “We’ve Helped Over 10,000 Families.”
Reinforce the CTA: Descriptions should support and expand on the calls to action in your headlines. If a headline says “Donate Today,” a description might explain what the donation funds: “Your gift provides meals, job training, and emergency housing to families in crisis. Every dollar stays local.”
Address the searcher’s underlying need: Think about what motivates the person who typed the query. Someone searching “food assistance near me” has an immediate need. A description that speaks directly to that — “Free food assistance available to all Chicago residents, no eligibility requirements” — will outperform a generic organizational description.
Include specifics: Concrete details outperform vague claims. “Over 2 million meals served” is stronger than “we’ve made a big impact.” “100% of donations fund direct services” is stronger than “we’re an efficient nonprofit.” Specificity builds credibility and drives clicks.
Display URL Path Fields
The two path fields appended to your display URL are small but meaningful. They appear in the ad as yournonprofit.org/path1/path2 and give users a preview of where they’ll land. Use them to reinforce relevance — “/Donate-Now,” “/Volunteer-Chicago,” “/Food-Assistance” — rather than leaving them blank or using generic terms. They contribute to the searcher’s confidence that the destination matches their query.
Common Ad Copy Mistakes
All headlines say the same thing: Google needs variety to test and optimize. Fifteen slight variations of “Donate to Our Nonprofit Today” give the algorithm nothing to work with. Write headlines that approach the offer from different angles.
No keywords in headlines: Generic headlines that could belong to any nonprofit — “Making a Difference Every Day,” “Your Community Needs You” — earn low relevance scores and poor Quality Scores. Ground at least three to four headlines in the specific keywords your ad group targets.
Weak or absent calls to action: Nonprofit ad copy often defaults to awareness messaging without telling users what to do. Every ad should contain multiple explicit CTAs across headlines and descriptions.
Descriptions that repeat headline content: With limited space, every word needs to earn its place. Descriptions that restate what the headlines already said waste the opportunity to add context, detail, or a secondary CTA.
Not aiming for Excellent ad strength: The Ad Strength indicator in Google Ads directly reflects how well your creative is configured. If an ad is rated Poor or Average, review which signals are dragging it down and revise before publishing.
Want ad copy written automatically from your website content? Ad Grants Pilot generates all headlines and descriptions using AI trained on your organization’s messaging — producing campaign-ready ad creative in seconds.