How to Write Better Google Ads: Headlines and Descriptions That Convert

Strong ad copy improves CTR, Quality Score, and conversion rates. In 2026, RSAs are the default format — you need diverse, high-quality building blocks for Google's AI to assemble winning combinations. This guide gives you frameworks, formulas, and testing methods.

RSA Headline Framework

Provide 10-15 unique headlines per RSA covering five types:

• Keyword headlines: Include main keyword verbatim for Ad Relevance
• Benefit headlines: Lead with outcomes ('Boost Sales 40%', 'Save 10 Hours/Week')
• Social proof: Use credibility ('Trusted by 50,000+ Teams', '4.8 Stars')
• Urgency/Offer: Create urgency ('Free Trial — No Card Needed', '50% Off')
• Question: Engage curiosity ('Tired of High CPC?', 'Want Better ROAS?')

Description Best Practices

Descriptions reinforce headlines and drive action. Use all 90 characters — longer descriptions perform better.

• Start with strongest selling point
• Include clear CTA: 'Start Free Trial', 'Get Quote Today'
• Reinforce headline promise with specifics
• Include secondary keywords naturally
• Test emotional vs. rational appeals

Ad Copy Formulas That Work

Use proven frameworks to structure compelling copy:

Testing and Iteration

Ad copy optimization never ends. Follow this cycle every 2-4 weeks:

Common Mistakes

Avoid these errors that kill ad performance:

• Generic headlines that could be any competitor
• Not including target keyword in any headline
• Using all caps or excessive punctuation
• Unsubstantiated superlative claims
• Pinning too many headlines to positions
• Writing similar headlines without variety

Key Takeaways

• Provide 10-15 diverse headlines covering 5 types
• Descriptions: strong selling point + clear CTA + specifics
• Use PAS and BAB formulas for compelling copy
• Test and replace underperforming assets every 2 weeks
• Refresh all copy quarterly to combat fatigue