Sitemaps are XML files used by Google to index your website by using their Webmaster Tools and telling them the location of your sitemap.
The CMSSitemap will create a sitemap with all the published pages of your cms
Add django.contrib.sitemaps to your project’s INSTALLED_APPS setting. Add from cms.sitemaps import CMSSitemap to the top of your main urls.py. Add url(r'^sitemap.xml$', 'django.contrib.sitemaps.views.sitemap', {'sitemaps': {'cmspages': CMSSitemap}}) to your urlpatterns.
More information about django.contrib.sitemaps can be found in the official Django documentation.