We can classify the components in a user interface into container and presentational components.

The container components are components that do not have a relevant visual effect. Their main role is to group other components, that is, contain other components. For example, a form is usually a container component, since its main role is to contain other components, such as textboxes, labels, buttons, and so on.

The presentational components are components that display data in some graphical form. A textbox, a date picker, and a toolbar are examples of presentational components.

The distinction between container and presentational components is very important in order to create efficient user interfaces in React. We will exploit this distinction later, when we learn to manage the components' state and to propagate data through the components.