It is important for parents to know what their kid is doing on mobile phones and internet because the excess use of internet and mobile phones have negative effects on kids physical and mental health like depression, anxiety, insomnia, etc.
Apart from this there are a lot of disadvantages of mobile phones if it is not used carefully by the kids. There are a lot of advantages of mobile phones, like kids can easily communicate with their friends and family or search on the internet regarding studies, etc. Every kid has a mobile phone, and it is important for them now because a lot of studies are done using mobile phones recently.
The use of mobile phones has become very common nowadays especially in kids.