What is hub and spoke navigation?
Hub and Spoke Navigation
This model uses a single central screen which acts to enable the user to explore different sections (spokes) of the app. If you wish to shift from one spoke to another – you must do so via the hub.
How is the navigation of the mobile application?
The navigation is the way your users will get from point A to point B. It's how they'll discover the design and interact with the product. Designers and writers have described navigation as the road system of an app, because they are the highways that users need to enjoy the product.