Just like the Play Store, the feature pops up a small authorization window and install button.
you might test this yourself by opening the Google app and searching for the name of an app.
It will appear at the top of the results with an install button.
However, when most people tap it, they are booted into the Play Store.
Currently, the feature is only visible on the Google app and not found on Chrome.
Android Police has had reports of this feature working dating back to about a month ago.
However, only recently it has started appearing extensively enough.
source: www.techworm.net
