Components are building blocks you can use to make your application. It is used for mainly 3 reasons:
- Creating a component that can be reused in multiple places (e.g. a header)
The components of your application are gathered in the components tab in the left sidebar. There you can create new components or select existing ones to edit.
Here you can see an example of a header component being added to a page using de Reutilizable Component element.