Structure Snippet Extension Structure snippet extensions are very similar to callout extensions but structured with a parent category. For example, Stitchfix's ad extensions are structured with a parent category "Styles", and it lists some main subcategories under styles. Using this extension will give potential visitors more context and information about your product. Google actually does favor this extension over the callout extension because it is more organized and structured. It is better to use the structure snippet extension for practical product and services information. Save the callout extensions for benefits and promotions. App Extension If you are advertising apps and trying to get app downloads, the app extension is a good choice. You can use the app extension to send clicks directly to the app in the App store. For example, when I search "book hotels" on Google, it shows me the Expedia ad which has an app extension. It has a call t...