What does "Profile Lock is on" mean on Netflix?

Isn't it just that now you can only use Netflix on one device.. No more using several people with one account?

This is the Parental Control for the profile you want to block .

Profile Lock feature;  especially when there is more than one person's profile in a single account;  will prevent one user from entering another user's profile.If the lock is enabled;  It will be necessary to enter a password when trying to log in to the profile in question from web browser, mobile and TV applications.

Open the Account page in a web browser. Go to the Profile and Parental Controls section for the profile you want to block. Change the Profile Lock setting. Enter your Netflix account password.

Basically it's parental control

This is to protect your profile with a 4-digit PIN code. In addition to limiting access to Netflix for children, you can also enter a range of age categories.

This means that someone who knows your password has blocked the account in the parental lock settings

Maybe mess with parental controls?

The message "Profile Lock is On" means that access to a specific profile on your Netflix account is blocked. A blocked profile means that a person who is logged into that profile will not be able to view content marked as mature.

Profile Lock is useful when, for example, parents want to restrict their children's access to adult content on their Netflix account. You can turn it on or off in your Netflix account settings. To unlock the profile, the account owner will need to provide a password or other authentication.

You won't see anything in one word

One account can be used by one person.

A "Profile Lock is On" message on Netflix means that your account has been set to a profile lock that prevents you from using that profile.