Security-enhanced Linux (SELinux) is like a super protector for your computer. Just like you use a helmet to protect your head while riding a bike or a seatbelt to protect you in a car, SELinux helps protect your computer from bad guys who want to do bad things.
When you install SELinux on your computer, it makes sure that only the good guys are allowed to access your files and data. It does this by giving each program and user on your computer a label, like a name tag. These labels tell SELinux who is allowed to access what on your computer.
SELinux always watches out for bad guys trying to sneak in or steal something from your computer. If it detects that a program or user is doing something that it's not supposed to do, it'll stop it from working and send you a warning. That way, you can keep your computer safe and secure even if a bad guy tries to attack it.
It's like having your own superhero keeping watch over your computer, making sure it's safe and secure. So, next time you hear about SELinux, remember that it's like having a super protector for your computer!