This is to guarantee safety from things like viruses, worms and other bots that can be passed through certain systems. Students need to learn and be aware of what attacks as can look like and how to prevent them from happening.
For example students can sometimes be very intrigued by an add that may pop up while they are in the internet but learning whether or not it is safe to open it or not is a very important skill they need to learn to keep themselves and their device safe.