ReadMe has introduced Custom Components, a feature that allows users to create customizable and reusable components like buttons, graphs, and image carousels for API documentation. These components are powered by an MDX-backed editor, which combines Markdown with embedded JSX, running on React. The guide provides a step-by-step walkthrough for building a SimpleStepper component using React and Tailwind CSS, detailing how to structure, style, and implement state management and navigation functionalities. This feature is available on the Refactored experience of ReadMe, enabling users to enhance their documentation with dynamic and interactive elements. Additionally, ReadMe offers a marketplace for pre-built components and encourages community contributions, with plans for a live workshop to demonstrate component building and provide further insights into customization options.