Django rest framework - using views

I've read about performances in django but haven't fully understood everything yet.

When using view in django, for example

class SnippetViewSet(viewsets.ModelViewSet):
    """
    This viewset automatically provides `list`, `create`, `retrieve`,
    `update` and `destroy` actions.

    Additionally we also provide an extra `highlight` action.
    """
    queryset = Snippet.objects.all()
    serializer_class = SnippetSerializer
    permission_classes = (permissions.IsAuthenticatedOrReadOnly,
                          IsOwnerOrReadOnly,)

    @detail_route(renderer_classes=[renderers.StaticHTMLRenderer])
    def highlight(self, request, *args, **kwargs):
        snippet = self.get_object()
        return Response(snippet.highlighted)

      

        
        
        
      

    

and Routing looks like this

router = DefaultRouter()
router.register(r'snippets', views.SnippetViewSet)

      

        
        
        
      

    

In comments in the presentation they say - "This view is automatically provided steps list

, create

, retrieve

, update

and destroy

."

EDIT:

 @detail_route(methods=['post'])
    def register(request):
        serializer = UserSerializer(data=request.DATA)
        if serializer.is_valid():
            user = User.objects.create_user(
                username = serializer.init_data['username'],
                password = serializer.init_data['password'],
            )

            return Response(serializer.data, status=status.HTTP_201_CREATED)
        else:
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

      

        
        
        
      

    

• How do I access each of these methods? and How do I access the selection method?
• The url registered with the router is / fragments. Am I doing fragments / creating? or fragments / delete?
• What does ModelViewSet really do for a URL structure?