Firewalls are a protective barrier between your computer, phone or tablet and the other computers that are connected to you. As soon as you are connected to the internet, the whole world can see you and this can make your computer vulnerable to cyber threats. When data is exchanged between computers it goes into cyberspace. Firewalls monitor this data to decide whether it is safe, and therefore firewalls are essential!
If your computer is left unprotected, it can quickly be attacked with popup messages and viruses among other things, all in a matter of minutes. Having a firewall installed can prevent some of these attacks from taking place. In some instances, hackers can install a trojan (malware which is misleading to the user) onto your PC which will give them the power to control it.
