What Inactive Account Manager actually does
Google watches the activity signals on your account, such as sign-ins, Android check-ins, and Gmail use. If none are seen for the period you chose, Google sends warnings to your phone and recovery email. If nobody responds, your trusted contacts receive an email with the data you allowed them to download, and your account can optionally be deleted.
Set it up in five minutes
Go to myaccount.google.com/inactive and click Start. Choose how long Google should wait before treating the account as inactive (three, six, twelve, or eighteen months). Add a recovery phone and email for the warnings. Add up to ten trusted contacts, and for each one tick which data they may receive, for example Gmail, Drive, Photos, YouTube, or Contacts. Choose whether the account is deleted after the trusted contacts are notified. Save the plan; you can edit it any time.
What it covers, and what it does not
It covers data inside your Google Account: Gmail, Drive, Photos, YouTube, Contacts, Calendar, Keep, Tasks, and others. It does not cover purchases on Google Play or paid subscriptions, and it does not deliver a personal message in your voice. The trusted contact receives a download link, not a sealed letter from you.
Where Y.O.D.O. fits alongside it
Inactive Account Manager is a Google-only handover triggered by inactivity. Y.O.D.O. is a private communication support service for the human side: scheduled and quick check-ins while you are alive, and sealed messages released only after a Delegate has reported a passing, identity verification has completed, and a 72-hour dispute window has closed. Many people set up both: Inactive Account Manager handles Google data, Y.O.D.O. carries the words.
A note on warning windows
Google sends multiple warnings before any data is shared, including SMS to your phone and email to your recovery address. If you travel often or change phones, keep these contact details current so a false trigger does not surprise your trusted contacts. You can also pause the plan by simply signing back in.