Bootstrap is like a Lego set for web pages: it's a collection of tools that makes it easier and faster to create a website. It lets you use pre-built pieces (like HTML and CSS code) to quickly create the basic structure of a website. This means you don't have to write all of the code from scratch, and you can start building your website faster. It even includes pieces for animations and design, so you don't have to look for special ways to make your website look nice.