Clarify when to use a link vs. site content
Related to internal discussion https://dev.gitlab.org/gitlab/organization/issues/827 , and really only makes sense after https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/1989 is merged.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Related to internal discussion https://dev.gitlab.org/gitlab/organization/issues/827 , and really only makes sense after https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/1989 is merged.