Okay kiddo, Pascal is a type of language that people use to write computer programs. It's named after a famous mathematician named Blaise Pascal who invented a type of calculator a loooong time ago.
Just like how you have to learn to speak a language before you can talk to people, programmers have to learn how to write code in a particular language before they can talk to computers. Pascal is one of those languages.
One of the cool things about Pascal is that it's really easy to use for beginners. It has simple rules that make it easy to understand what the code is doing. For example, if you want to tell a computer to add two numbers together, in Pascal you would write "a := b + c".
Pascal also has some special words called "keywords" that tell the computer what to do. For example, "if" is a keyword that starts a condition that tells the computer to do something if something else is true.
A lot of colleges and universities teach Pascal to their students because it's a good language for learning the basics of programming. But even though it's easy to use and was popular in the past, nowadays people usually use other languages such as Python or Java for writing more complex programs.
But don't worry, you'll learn more about those languages when you're older!