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What are responsive search ads (RSAs)?

Short answer

Responsive search ads are the standard text ads in Google Search. You write up to 15 headlines and 4 descriptions, and Google tests combinations to show the best mix for each search. Headlines allow 30 characters and descriptions 90. Each ad shows up to three headlines and two descriptions at a time.

In this answer
  1. 01The limits at a glance
  2. 02How Google mixes them
  3. 03Write headlines that cover different angles
  4. 04What Ad Strength means

The limits at a glance

PartAllowedCharacter limit
Headlines3 to 1530 each
Descriptions2 to 490 each
Display path2 fields15 each

Headline 1 and description 1 usually show. Headlines 2 and 3 and description 2 may appear but are not guaranteed, so each one must make sense alone.

How Google mixes them

Google combines your headlines and descriptions in different orders and learns which mixes get clicks. You can pin a line to a position, but Google says pinning is not recommended for most advertisers. Pins cut the combinations it can test and can lower Ad Strength.

Write headlines that cover different angles

  • The service and city, like "Water Heater Repair in Orlando"
  • Speed, like "Same-Day Service Available"
  • Proof, like "Licensed and Insured Since 2009"
  • An offer, like "Free Estimate on Every Install"
  • A call to action, like "Call Now for a Quote"

Ten similar headlines teach Google nothing. Ten different angles let it find what works.

What Ad Strength means

Ad Strength rates how varied and relevant your text is, from Poor to Excellent. It is a guide, not a ranking factor. Google suggests at least two good ads per ad group, each with a unique final URL.

Good example. A dentist writes headlines on implants, financing, reviews, location and a call to action. Google finds that "Same-Week Appointments" wins.

Bad example. A dentist writes six headlines that all say "Best Dentist" in slightly different words.

See our guide to PPC ad copy. In our Google Ads management, each new ad runs against a proven one.

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