Merge branch 'update-third-party-offers-docs' into 'master'

Update Third party offers docs

See merge request gitlab-org/gitlab-ee!6624

doc/user/admin_area/settings/third_party_offers.md

@@ -3,4 +3,7 @@
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20379)
 > in [GitLab Core](https://about.gitlab.com/pricing/) 11.1
 
-The display of third party offers can be controlled in the Admin Area -> Settings page.
+Within GitLab, we inform users of available third-party offers they might find valuable in order to enhance the development of their projects.  
+An example is the Google Cloud Platform free credit for using [Google Kubernetes Engine](https://cloud.google.com/kubernetes-engine/).
+
+The display of third-party offers can be toggled in the Admin area on the Settings page.