ELI5: Explain Like I'm 5

Multi-core processor

Imagine that you have a big box of Lego blocks, and you need to build a really cool spaceship. You might think that the fastest way to build it is for just one person to do it all by themselves. But what if you had some help?

A multi-core processor is kind of like having help building your Lego spaceship. It's a computer chip that has more than one "brain" inside it, so it can do more things at once.

The chip works by splitting up tasks and giving each brain a different part of the work to do. So while Brain A is working on one part of your spaceship, Brain B is working on another part. This makes everything go faster, because instead of just one person doing everything, you have two or more people working together.

Just like with Lego blocks, it's important that the different parts of the work can be separated into smaller, more manageable pieces. If everything had to be done all at once, having more brains wouldn't really help.

So when you hear about computers having "quad-core" processors or "octa-core" processors, that just means that they have four or eight brains inside them, respectively. And the more cores a processor has, the more tasks it can split up and work on at the same time.