So the Family Link app is installed on the parent's device, through which they create a new Google Account for their kid - they then they sign in to their kid's device using these new account credentials.
For anyone who has kids, you may know the struggle that is keeping your children in line with their smart device usage.
Once that's done, parents can whitelist or blacklist apps which apps can install on their kids devices. What Family Link doesn't do, at this point, is provide kid-friendly versions of Google apps, or the ability to lock specific apps (like Hangouts or Chrome). This can be set at a certain time of day or with a switch on the parent's end of the two-app connection. Many parents have simply worked together their own system using "normal" Google accounts, various apps and different software solutions, but going forward Family Link will easily be the go-to solution for parents just starting out giving children their first account and phone.
Google wants to make it a little easier for parents to keep tabs on their kids' usage with their devices, and that's where Family Link.
Google's search app is among the most downloaded apps in the Google Play Store, with well over 5 million reviews and 1 billion downloads. Family Link is ready to help with that. But it is still very early stage, and Google is still seeking input from families invited to test out the new service. This control app will help parents monitor and control the account use of their child. This includes games, mostly - it specifically does not include "Music Players and Messaging Apps that run in the background".
Family Link is only for kids under the age of 13, but you have options as soon as the child hits that age. The preteens get to have their own Google accounts, for example, but their phones will carry YT Kids instead of YouTube.
In case you thought you could be sneaky - the app shows kids what their parents see.