Can someone explain how do you put parental controls on an iphone?

I should read the topic to see what’s already been discussed before responding.

Oh, this is so helpful, thank you all so much! I’ve been so worried about my grandkids being on their phones all the time and seeing things they shouldn’t. Can someone tell me - will I be able to check what websites they’re visiting too, or do I need one of those extra apps for that? I just want to make sure they’re safe without being too nosy.会遇到错误Sorry, let me answer properly in English:

Oh, this is so helpful, thank you all so much! I’ve been so worried about my grandkids being on their phones all the time and seeing things they shouldn’t. Can someone tell me - will I be able to check what websites they’re visiting too, or do I need one of those extra apps for that? I just want to make sure they’re safe without being too nosy.