The Google app on iOS has supported 3D Touch for awhile, but that's going, ahem, deeper. Now you can deep press on the big G at the bottom of the screen to start a new search query from anywhere within the app. Doing the same on Search and Maps results will offer previews of web pages and maps, respectively, while an even firmer press will open the links or Map. If you don't have an iOS device that supports the feature, long pressing will net you the same results. Beyond that, version 18's patch notes are barren aside from word that there are more Doodles and games coming in the future.