As the primary account holder, you have two options for controlling viewing on the account. By setting a 4 digit PIN or setting a maturity level on a profile.
While on your browser go to netflix.com and click ‘Sign in’.
Controls & Settings guide
Netflix Parental Controls allow you to restrict access to content of varying maturity levels. You can create individual profiles with different control levels suitable for Little Kids, Older Kids, Teens and adults. These need to be set on a computer to cover all devices.
See more resources and articles to help children stay safe online.