diff --git a/doc/usage/extensions/index.rst b/doc/usage/extensions/index.rst
index b799761e0..3d076fb3a 100644
--- a/doc/usage/extensions/index.rst
+++ b/doc/usage/extensions/index.rst
@@ -45,11 +45,15 @@ You can find several extensions contributed by users in the `sphinx-contrib`__
 organization. If you wish to include your extension in this organization,
 simply follow the instructions provided in the `github-administration`__
 project. This is optional and there are several extensions hosted elsewhere.
-The `awesome-sphinxdoc`__ project contains a comprehensive list.
+The `awesome-sphinxdoc`__ project contains a curated list of Sphinx packages,
+and many packages use the ``Framework :: Sphinx :: Extension`` and
+``Framework :: Sphinx :: Theme`` `trove classifiers`__ for Sphinx extensions
+and themes, respectively.
 
 .. __: https://github.com/sphinx-contrib/
 .. __: https://github.com/sphinx-contrib/github-administration
 .. __: https://github.com/yoloseem/awesome-sphinxdoc
+.. __: https://pypi.org/classifiers/
 
 Where to put your own extensions?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~