4th Line Annotations

Two women place post-it notes on a glass wall.

The 4th Line Annotation is a second description line that contains the best annotation for the ad, based on content from the advertiser's landing page and relevant to the user's search query. It provides relevant and engaging at-a-glance information, such as product details or venue information, from reputable third-party sources.

Fourth line annotation example

Results: Some partners have seen an estimated lift of +1.7% CTR and +2.1% RPM when combined with Callout Extensions and 4th Line Annotations. Results may vary.

Markets: NAR (US, CA), EMEA (UK, FR, DE, ES, IT, NL, de-CH, fr-CH, it-CH, SE)

Parameter: "adEnable4thLine" (case sensitive)


  • Advertise with us
  • Find the right advertising solutions for your business.
  • Join us
  • Spend every day connecting people with the things they love.
  • Follow us
© 2020 Verizon Media. All Rights Reserved