Sitelinks, the first Google ad extension, was introduced in 2009. They enabled advertisers to expand the total size of their text ads while also providing additional links to the advertiser’s website.
In the ten years that followed these original ad extensions, Google rolled out an additional ten manual and automated extensions and two automated-only extensions.
Manual extensions require that advertisers set them up within Google Ads before they can show up in the actual ad.
Automated extensions[1] require no set up on the advertiser’s part – Google Ads these automatically based on system predictions of performance.
Since ad extensions only appear beneath the main body of the ad at Google’s discretion, there’s no easy way to preview an ad with the extensions included, thus it’s challenging for Google Ads managers and agencies to explain to clients what their actual ad might look like to searchers.
This inspired me to create an in-depth, fully illustrated guide of Google’s ad extensions[2].
What follows is a summary of this guide which includes samples of the top four ad extensions and how they appear on either mobile or desktop devices. The full guide is available here[3].
The importance of ad extensions
Google’s data shows that ad extensions increase CTR by as much as 15%, though, in my experience, it can often be much higher than this.
Extensionless ads are smaller and take up less space, so they tend to get fewer clicks.
The ad on the left is what the ad preview looks like in Google’s desktop ad editor. There’s no easy way to view the ad as it might appear with extensions, as shown on