Merge pull request #5054 from nelsonjchen/non-crawl-wiki-pages

Wikis aren't crawled. Suggest GH Pages alternative

content/communities/documenting-your-project-with-wikis/about-wikis.md

@@ -22,6 +22,12 @@ With wikis, you can write content just like everywhere else on {% data variables
 
 You can edit wikis directly on {% data variables.product.product_name %}, or you can edit wiki files locally. By default, only people with write access to your repository can make changes to wikis, although you can allow everyone on {% data variables.product.product_location %} to contribute to a wiki in {% if currentVersion == "github-ae@latest" %}an internal{% else %}a public{% endif %} repository. For more information, see "[Changing access permissions for wikis](/communities/documenting-your-project-with-wikis/changing-access-permissions-for-wikis)".
 
+{% note %}
+
+**Note:** Search engines will not index the contents of wikis. To have your content indexed by search engines, you can use [{% data variables.product.prodname_pages %}](/pages) in a public repository.
+
+{% endnote %}
+
 ### Further reading
 
 - "[Adding or editing wiki pages](/communities/documenting-your-project-with-wikis/adding-or-editing-wiki-pages)"