What is the best way to learn about what children are doing on the Internet?

Use keylogger https://www.refog.com/keylogger.html to learn more about your kids' online activities. A Keylogger is a short form for the word “keystroke logger.” Whenever the necessary permissions are given from the target device, the Keylogger tool tracks down all the words that the user types. And those words are then shown on the tracking app's dashboard on the parent's or your device remotely.