Rails 3: What does this route do? - ruby-on-rails-3

Question

Looking for a little helping understanding how this route would work?
New route:
resources :artists do
resources :users
end
entire routes
resources :artists do
resources :users
end
match 'auth/:provider/callback' => 'authentications#create'
resources :authentications
devise_for :admins
match '/admin' => 'RailsAdmin/Main#index'
devise_for :users, :controllers => {:registrations => 'registrations'} do
match '/users/change_password', :to => 'registrations#change_password'
match '/users/edit_account', :to => 'registrations#edit_account'
end
resources :posts do
member do
get :likers
end
collection do
get :search
end
end
resources :relationships, :only => [:create, :destroy]
resources :appreciations, :only => [:create, :destroy]
match '/a_json/:id', :to => 'artists#index'
match '/s_json/:id', :to => 'stores#index'
match '/contact', :to => 'pages#contact'
match '/about', :to => 'pages#about'
match '/help', :to => 'pages#help'
match '/blog', :to => 'pages#blog'
resources :users do
member do
get :following, :followers, :likes
end
end
# This is a legacy wild controller route that's not recommended for RESTful applications.
# Note: This route will make all actions in every controller accessible via GET requests.
# match ':controller(/:action(/:id(.:format)))'
match '/:id' => 'users#show', :constraints => {:id => /[^\/]+/}, :as => :global_user
root :to => "pages#home"
end

Answer 1

This would create nested routes, allowing you to use URLs like /artists/5/users/45, which would call UsersController#show with a parameter artist_id which was 5, and a parameter id which was 45. All of the other usual RESTful routes are also created "nested" under a single artist.
Rails actually has a tool for showing you what routes have been generated: just run rake routes to take a peek.