Go to your Google Account. On the left navigation panel, select Security . On the Your devices panel, select Manage all devices. You'll see devices where you're currently signed in to your Google Account or have been in the last few weeks.

To sign in to your Google Account (or any Google product): Go to the sign in page of the product (for Google Accounts it is myaccount.google.com). Enter your Gmail username (everything that appears before '@gmail.com'). Enter your password.

Check for suspicious account activity Go to your Google Account. On the left navigation panel, click Security. On the Recent security events panel, click Review security events. Review your recent activity and look for unfamiliar locations or devices.