This depends primarily on the age of the child. The following limits are recommended with regard to the duration of use:
4-6 years old: about 20 minutes, not daily.
7-10 years old: approx. 30 - 45 minutes daily
10-13 years old: approx. 60 minutes daily
14-17 years old: after consultation to prevent excessive use
What the child does on the computer and what media they consume is also important. While you can encourage work with informative educational software, you should pay close attention to what your child is consuming when it comes to YouTube and social networks, as well as computer games.