Google Password Manager 101
First things first: You shouldn’t have to do anything to turn the Google Password Manager on. The system, once considered part of Google’s Smart Lock feature, works across Android, iOS, ChromeOS, and any other desktop platform where you’re signed into Chrome — and it’s typically activated by default in all of those places.
You’ll see the Password Manager’s prompts for credential-saving pop up anytime you enter your username and password into a site within the Chrome browser. The service will also offer to create complex new passwords for you when you’re signing up for something new. And whenever you return to a site where your credentials have been stored, Smart Lock will automatically fill them in for you — or, when more than one sign-in is associated with a single site, it’ll provide you with the option to pick the account you want to use.
The system is able to sign you into Android apps automatically, too, though it works somewhat sporadically — and you never quite know when it’ll be present. To use Google Password Manager in that way, you’ll need to search your Android device’s system settings for autofill, then: