A React course is a comprehensive educational program focused on teaching React, a popular JavaScript library for building user interfaces. In such a course, you'll learn the fundamental concepts of React, including components, state management, and the virtual DOM. You'll also explore how to create interactive and responsive web applications using React, often with the help of tools like JSX, Redux, and React Router. These courses typically cover topics like component lifecycle, props, hooks, and best practices for efficient and scalable development. By the end of the course, you should have the skills to build modern web applications with React.