"The Google app for iOS now supports an iMessage extension to help you search and share GIFs, restaurants and videos, whenever you’re messaging a friend. You can tap on the icon for “Food” or “Nearby” to share your favorite locations, or perform a search and share a card directly into the conversation. Want to research a new restaurant before sharing it with friends? Just tap on the restaurant card, and we’ll take you to the Google Search page, where you can look up the busiest times, as well as menus and reviews. Switch to GIF Search mode, and you can find and share a “happy birthday” GIF.Getting more done with Search on iOS
If you already have the Google app on your device, no additional installation is required. Just open iMessage, tap the iMessage apps drawer, and tap on Google app icon."
Tuesday, March 06, 2018
Getting more done with Search on iOS (Google Keyword blog)
Check the full post for overviews of a couple other handy extension/integration options