Custom Elements are a way to create your own reusable, encapsulated components for web pages. Think of them like building blocks—once you define a custom element, you can use it repeatedly across your site, just like standard HTML tags (e.g., or ). They allow developers to extend HTML’s capabilities, making complex or unique functionality easier to manage and organize. Custom Elements work with modern web standards and are part of the Web Components suite, promoting modular, maintainable, and consistent user interfaces.