static propTypes static ?

`propTypes` is a static property of a React component class that is used to define the types of props (short for properties) that are expected to be passed to the component. It helps to catch errors early by providing runtime type checking for the props.

On the other hand, `static` is a keyword in JavaScript that is used to define a static method or property on a class. A static method or property is one that belongs to the class itself, rather than to any instance of the class. It can be accessed without creating an instance of the class.

So, `static propTypes` is a specific use case of the `static` keyword in React components. It is used to define the expected types of props for a component.