1. Components: React components are the building blocks of any React application. They are pieces of code that can be reused throughout your application. For example, a Button component might be used to render a button in multiple places throughout your application.
2. Virtual DOM: The Virtual DOM is a JavaScript representation of the actual DOM. It is a lightweight and fast way of updating the view when the state changes.
3. JSX: JSX is a syntax extension to JavaScript that allows you to write HTML-like code in your React components. It makes it easier to read and write React components.
4. Props: Props are used to pass data from one component to another. They are like function arguments that are passed in when a component is rendered.
5. State: State is used to store data that changes over time. It is an object that is managed within a component and can be accessed and updated using setState.
6. Lifecycle Methods: Lifecycle methods are methods that get called at certain points in a component’s life. They allow you to perform certain actions when a component is created, updated, or destroyed.