Responsive Search Ads replaced Expanded Text Ads as Google's standard Search ad format. Instead of writing a fixed ad with predetermined headline combinations, you provide components and Google's AI tests combinations to find which performs best for each user and query.
Up to 15 headlines (30 characters each) + up to 4 descriptions (90 characters each). Google shows a maximum of 3 headlines and 2 descriptions at once. Over time, it learns which combinations earn the most clicks and conversions.
Here's what an RSA looks like in the search results:
The Ad Strength rating (Poor / Good / Excellent) gives you real-time feedback on the quality and diversity of your headlines and descriptions. Excellent-rated ads typically have more unique headlines, include keywords, and avoid repetition across headlines.
Each headline has 30 characters — barely a sentence. Every character counts. Here are the proven techniques for writing headlines that perform:
Include the main keyword in at least one headline. If someone searches "women's running shoes" and your headline contains those exact words, Google bolds them — making your ad visually stand out. More importantly, it signals relevance, which boosts CTR and Quality Score.
Use specific numbers. "Save Up to 40% Today" outperforms "Great Discounts Available" every time. Numbers are concrete, scannable, and credible. "5-Star Rated by 2,000+" beats "Highly Recommended."
Ask a question. "Looking for Trail Running Shoes?" immediately qualifies the reader and creates a sense of direct conversation. Questions work particularly well for discovery-stage searches.
Create urgency without being manipulative. "Free Delivery Ends Sunday" is an honest urgency trigger. "BUY NOW LIMITED TIME!!!" looks like spam. Urgency should be real and specific.
Pin sparingly. You can pin headlines to specific positions (1, 2, or 3). Pinning reduces Google's ability to find the best combinations. Only pin when a headline is absolutely essential in that position — like a legal disclaimer or a core brand message.
Descriptions give you 90 characters (per description) to move a prospect from "interested" to "clicking." With 4 descriptions available, you can cover multiple angles. Here's how to use them:
Lead with the benefit, not the feature. "Waterproof upper" is a feature. "Stay dry through any run" is a benefit. Customers buy benefits. Features are just evidence that the benefit is real.
Include social proof. "Trusted by 50,000+ runners" or "Rated 4.9/5 from 2,000 reviews" immediately reduce the risk perception of clicking and converting. Social proof is particularly powerful for new-to-brand traffic.
Address the main objection. What stops someone from buying? Price? Commitment? Returns? Answer it directly: "Free 30-day returns, no questions asked" eliminates purchase risk. "Cancel anytime" removes commitment fear.
Use all 90 characters. Every unused character is a missed opportunity. If your description is 60 characters, you're leaving 30 characters of free advertising space on the table.
Writing 15 truly diverse headlines is harder than it sounds — many advertisers run out of ideas after 6 and start repeating themselves. Here's a framework that fills all 15 with distinct angles:
Google's Ad Strength algorithm rewards uniqueness. Headlines that say the same thing with different words (e.g., "Great Running Shoes" and "Excellent Running Footwear") are treated as low-diversity and hurt your score. Each headline should cover a genuinely different angle.
Google rates every RSA with an Ad Strength score: Poor, Good, or Excellent. This score is a real-time quality indicator that correlates with auction performance — not perfectly, but meaningfully.
Excellent-rated ads don't always outperform Good-rated ads — Ad Strength is not the same as conversion rate. But Excellent ads give Google's system more combinations to test, which accelerates learning and increases the likelihood of finding high-performing headline combinations.
"Best Running Shoes," "Top Running Shoes," "Great Running Footwear" — three headlines, zero unique information. Google treats these as low-diversity and shows them less.
Fix: Use the 5-category framework (keyword, benefit, USP, social proof, CTA) to force genuine variety.Descriptions that describe but never direct are wasted space. Users need a prompt to take action — "Shop now," "Get a free quote," "Book your free consultation."
Fix: End at least one description with a clear, specific call to action.Writing a 15-character headline when you have 30 available. A 45-character description when you have 90. Every unused character is free real estate you're giving back.
Fix: Always push toward the character limit. Add specifics, social proof, or detail to fill the space meaningfully."We offer great service and quality products at competitive prices" describes every business on earth. It signals nothing and convinces no one.
Fix: Every claim should be specific and verifiable. "2-hour response time," "rated 4.9/5," "free same-day delivery" are claims. "Great service" is not.Pinning 8 out of 15 headlines to fixed positions dramatically reduces the combinations Google can test. It also forces specific headlines into positions where they may perform poorly.
Fix: Pin only truly essential headlines (e.g., a legal requirement, your brand name). Let Google optimize the rest.Google's RSA system auto-optimizes — it'll naturally serve the best-performing combinations more often. But there are smarter ways to learn and improve:
Use Ad Variation experiments for major tests. If you want to test a completely different value proposition or messaging angle, Google's Ad Variations tool lets you run a proper A/B test with statistical significance rather than relying on RSA's internal optimization.
Monitor headline performance in the asset report. Under each RSA, you can see individual headline performance: Best, Good, Low. Headlines rated "Low" aren't necessarily bad — they may just not have enough data yet. But consistent "Low" ratings after significant impressions signal a headline worth replacing.
Never delete an ad without a replacement. If you delete a running RSA to launch a new one, you lose all the performance history and restart Google's learning phase. Instead, create the new ad and pause the old one only after the new one has been running for 2+ weeks with sufficient data.
Every time you edit a headline or description in an RSA, Google partially resets its performance data for that ad. Make changes deliberately — not constantly. Let ads run for 4–6 weeks before evaluating and editing.
Los Anuncios de Búsqueda Responsivos reemplazaron a los Anuncios de Texto Expandido como formato estándar de Google. En lugar de escribir un anuncio fijo, proporcionas componentes y la IA de Google prueba combinaciones para encontrar la que mejor funciona para cada usuario y consulta.
Hasta 15 titulares (30 caracteres cada uno) + hasta 4 descripciones (90 caracteres cada una). Google muestra un máximo de 3 titulares y 2 descripciones a la vez. Con el tiempo, aprende qué combinaciones obtienen más clics y conversiones.
La puntuación de Calidad del Anuncio (Bajo/Bueno/Excelente) te da feedback en tiempo real sobre la calidad y diversidad de tus titulares y descripciones.
Cada titular tiene 30 caracteres. Aquí están las técnicas probadas para escribir titulares que funcionan:
Incluye la keyword principal en al menos un titular. Cuando alguien busca "zapatillas running mujer" y tu titular contiene esas palabras exactas, Google las pone en negrita — haciendo que tu anuncio destaque visualmente.
Usa números específicos. "Ahorra hasta un 40% hoy" supera a "Grandes descuentos disponibles" en todo momento. Los números son concretos, legibles de un vistazo y creíbles.
Haz una pregunta. "¿Buscas zapatillas de trail?" califica inmediatamente al lector y crea una sensación de conversación directa.
Crea urgencia sin ser manipulador. "Envío gratis termina el domingo" es un disparador de urgencia honesto. La urgencia debe ser real y específica.
Ancla con moderación. Solo ancla cuando un titular sea absolutamente esencial en esa posición. Deja que Google optimice el resto.
Las descripciones te dan 90 caracteres (por descripción) para mover a un prospecto de "interesado" a "haciendo clic."
Lidera con el beneficio, no con la característica. "Membrana Gore-Tex impermeable" es una característica. "Corre sin importar el tiempo" es un beneficio. Los clientes compran beneficios.
Incluye prueba social. "Confiado por 50.000+ corredores" o "Valorado 4,9/5 en 2.000 reseñas" reduce inmediatamente la percepción de riesgo.
Aborda la objeción principal. "Devoluciones gratis 30 días, sin preguntas" elimina el riesgo de compra.
Usa todos los 90 caracteres. Cada carácter no utilizado es una oportunidad desperdiciada.
Aquí hay un marco que llena los 15 titulares con ángulos distintos:
Google valora cada RSA con una puntuación: Bajo, Bueno o Excelente.
"Mejores Zapatillas Running," "Top Zapatillas Running," "Excelente Calzado Running" — tres titulares, cero información única.
Solución: Usa el marco de 5 categorías para forzar variedad genuina.Descripciones que solo describen pero nunca dirigen son espacio desperdiciado. Los usuarios necesitan un impulso para actuar.
Solución: Termina al menos una descripción con una llamada a la acción clara y específica.Escribir un titular de 15 caracteres cuando tienes 30 disponibles. Cada carácter no utilizado es espacio publicitario gratuito que estás devolviendo.
Solución: Siempre empuja hacia el límite de caracteres. Añade detalles, prueba social o especificidad."Ofrecemos gran servicio y productos de calidad a precios competitivos" describe a todas las empresas del mundo.
Solución: Cada afirmación debe ser específica y verificable. "Respuesta en 2 horas," "4,9/5 valorado," "envío el mismo día gratis."Anclar 8 de 15 titulares a posiciones fijas reduce drásticamente las combinaciones que Google puede probar.
Solución: Ancla solo los titulares verdaderamente esenciales. Deja que Google optimice el resto.Usa experimentos de Variaciones de Anuncios para pruebas importantes. Si quieres probar una propuesta de valor completamente diferente, la herramienta de Variaciones de Anuncios de Google te permite ejecutar un test A/B con significancia estadística.
Monitoriza el rendimiento de los titulares en el informe de recursos. Cada titular tiene una calificación: Mejor, Bueno, Bajo. Las calificaciones "Bajo" consistentes después de impresiones significativas señalan un titular que vale la pena reemplazar.
Nunca elimines un anuncio sin un reemplazo. Si eliminas un RSA en funcionamiento, pierdes todo el historial de rendimiento y reiniciarás la fase de aprendizaje de Google.
Cada vez que editas un titular o descripción en un RSA, Google restablece parcialmente sus datos de rendimiento. Realiza cambios de forma deliberada, no constantemente. Deja que los anuncios funcionen 4-6 semanas antes de evaluar.
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