Pentium M is a type of computer processor that helps your computer think and work really fast. It's like a little brain inside the computer that helps it do lots of things at the same time.
Think of it like playing a game of catch with a friend. You throw the ball back and forth really fast, but sometimes you might drop it because it's hard to keep up. But with Pentium M, your computer can throw and catch the ball super quickly without dropping it, even if you're doing lots of other things at the same time.
This means you can have lots of programs open at once without your computer slowing down. For example, you can have a video playing, while you're browsing the internet and chatting with your friends, all at the same time, without your computer getting tired.
Overall, Pentium M is like a super-fast brain that helps your computer work quickly even with lots of things going on at the same time.