Google is emailing selected people to sign up and take a survey so they could possibly be picked to beta test an upcoming travel assistance app.
The email itself is being sent to members of Google's Local Guides program. They have to take a short survey about their use of Gmail or Inbox and their future travel plans. Details surrounding the app are currently unknown, though the Local Guides program has users rate locations and providing feedback.
If they get picked for the beta, they will be able to download the travel assistance app sometime next week. The app is being developed for Android and iPhone devices.
Thanks to everyone for the tips!