what is name in url django code example

Example 1: urlpatterns = [ path('SignUp/', views.SignupPage, name='user_data')\

from django.urls import include, path

urlpatterns = [
    path('index/', views.index, name='main-view'),
    path('bio/<username>/', views.bio, name='bio'),
    path('articles/<slug:title>/', views.article, name='article-detail'),
    path('articles/<slug:title>/<int:section>/', views.section, name='article-section'),
    path('weblog/', include('blog.urls')),
    ...
]

Example 2: slug urls django

path('<slug:slug>,<int:id>/', views.article_detail, name='article'),