[CCA-1108] Documentation for CCM preferred tags (#31782)

* add preferred tags docs

* address feedback

Author: ashleyyip

content/en/cloud_cost_management/tag_explorer/_index.md

@@ -146,6 +146,15 @@ For Twilio tags, select **Twilio** from the dropdown menu on the top right corne
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 {{< /tabs >}}
 
+## Set preferred tags
+Set up to five preferred tags to highlight your organization's most important tags throughout Cloud Cost Management. These tags appear first when selecting tags in the [Explorer page][7], [CCM Reports][8], and [Custom Allocation Rules][9], among other areas.
+
+{{< img src="cloud_cost/tag_explorer/preferred_tags_1.png" alt="Preferred tags are shown throughout CCM" style="width:100%;" >}}
+
+You can choose preferred tags from any of your existing cost data tags, including [Tag Pipelines][3]. These settings apply to your entire organization.
+
+{{< img src="cloud_cost/tag_explorer/preferred_tags_2.png" alt="Select your preferred tags in Tag Explorer" style="width:100%;" >}}
+
 ## Further reading
 
 {{< partial name="whats-next/whats-next.html" >}}
@@ -156,3 +165,6 @@ For Twilio tags, select **Twilio** from the dropdown menu on the top right corne
 [4]: /cloud_cost_management/setup/custom
 [5]: /cloud_cost_management/datadog_costs
 [6]: /cloud_cost_management/setup/saas_costs
+[7]: https://app.datadoghq.com/cost/explorer
+[8]: /cloud_cost_management/reports
+[9]: /cloud_cost_management/custom_allocation_rules