Hey Chris -  Segment creation via API is fully supported.  You can access the public docs for using the API here:https://www.adobe.io/apis/experienceplatform/home/tutorials/alltutorials.html#!api-specification/markdown/narrative/tutorials/creating_a_segment_tutorial/creating_a_segment_tutorial.md

Segmentation can happen at multiple levels within the Marketing Cloud, and this affects how quickly that segmentation event can be used for targeting.To learn more about how each solution uses audiences, check out our Audiences documentation.Audiences can be either real-time or historical in nature....

Sure.  Where was your audience created?  Was it shared from another solution like Analytics, or was it created in the Marketing Cloud or AudienceManager?

This is an excellent question!We've laid the groundwork to enable Customer Attributes in Audience Manager, and we're actively working on solving the remaining technical challenges, but so far Audience Manager does not yet support them.There are two primary ways to onboard CRM data into AAM – natural...

Thanks for your question!AEM Managed Services for 6.1 includes experience targeting functionality powered by Adobe Target. This includes shared audiences within the Marketing Cloud (and consequently shared audiences from your Audience Manager and Analytics accounts). If you are not using AEM Managed...

Sorry we missed your question!  I'll make sure it's moved to the Audiences forum.For option #1, you are correct.What I know is that in the first option, the created Audience that is shared, is visible in Audiences Library so I can use it to build my Target activity. However, the data are under colle...