Add a section about data collection for Pages (#20086)

Author: yoannchaudet

content/pages/getting-started-with-github-pages/about-github-pages.md

@@ -120,6 +120,12 @@ A MIME type is a header that a server sends to a browser, providing information
 
 While you can't specify custom MIME types on a per-file or per-repository basis, you can add or modify MIME types for use on {% data variables.product.prodname_pages %}. For more information, see [the mime-db contributing guidelines](https://github.com/jshttp/mime-db#adding-custom-media-types).
 
+{% if currentVersion == "free-pro-team@latest" %}
+## Data collection
+
+When a {% data variables.product.prodname_pages %} site is visited, the visitor's IP address is logged and stored for security purposes, regardless of whether the visitor has signed into {% data variables.product.prodname_dotcom %} or not. For more information about {% data variables.product.prodname_dotcom %}'s security practices, see <a href="/articles/github-privacy-statement/" class="dotcom-only">{% data variables.product.prodname_dotcom %} Privacy Statement</a>.
+{% endif %}
+
 ## Further reading
 
 - [{% data variables.product.prodname_pages %}](https://lab.github.com/githubtraining/github-pages) on {% data variables.product.prodname_learning %}