If you have conversation data coming from a third-party tool like Hustle or Iterable, you can segment on that activity through the Audience tool.  Click on Audience > Search to begin.

Then choose Activity > Conversations.  You can then choose from any of the criteria available to further refine your segment and drill down on your audience.

After you've selected your desired criteria, click "Save Selections" to continue refining your Audience.

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