Hi Bill,
I assume you are using Adobe Analytics as Reporting source for Target while Activity creation. Creating a Target Standard activity that uses Analytics as the reporting source is similar to setting up a regular Target Standard activity, with a few important differences. For example, you cannot select a segment for reporting while creating the activity because all segments available in Analytics can be applied when viewing a report.
When setting up activity after setting up Analytics as your reporting source, there is no option to set up audiences for reporting. Analytics segments are available in the Target Activities report.
When Analytics is used as the reporting source, reports in Target Standard show the data gathered from Analytics. The report differs somewhat from other Target Standard reports: The Audiences list shows the audiences available to your Analytics report suite.
You can apply the metric or audience to the report in Target Standard after the test has started, or even after the test has completed
https://marketing.adobe.com/resources/help/en_US/target/a4t/t_campaign_creation.html
Thanks & Regards
Parit Mittal