Understanding code in urls.py configuration file

I have been working through W3 Schools Django and reviewing my urls.py configuration file code.

from django.contrib import admin
from django.urls import include, path

urlpatterns = [
                path('', include('members.urls')),
                path('admin/', admin.site.urls),

What does contrib mean with from django.contrib import admin ?

What does include mean with from django.urls import include, path ?

What does urlpatterns actually mean ?
Is it a list that takes requests for urls or is it a tuple with a list of url requests ?

With path('', include('members.urls')),
My understanding is that this is gives
How does include work with this and why does members.urls need a dot ?

With path('admin/', admin.site.urls),
My understanding is that this gives
Why does it need dots with admin.site.urls ?

These aren’t, strictly speaking, Django-related questions. They’re more fundamentally Python language-related. You should read up on the docs regarding Python packages and the import statement.

See https://docs.python.org/3/tutorial/modules.html as a starting point, along with https://docs.python.org/3/reference/import.html#importsystem.