What are Activation Targets in Data Cloud and what are the key activation types?

Activation Targets define where and how segment members are pushed to downstream systems. Key types:

1. Salesforce CRM Activation — updates Contact or Lead records in the connected Salesforce org; can populate a Campaign Member or update custom fields. Enables CRM-based workflows to act on Data Cloud segments.
2. Marketing Cloud Activation — sends segment members into a Marketing Cloud Journey (as a Journey Entry Source) or updates a Subscription Center.
3. Advertising Activations — Facebook Ads: hashes PII (email/phone) and pushes to Custom Audiences. Google Ads: uploads to Customer Match lists. LinkedIn: populates Matched Audiences. Hashing is applied automatically to comply with platform requirements.
4. Activations are associated with a segment; when the segment refreshes, the activation automatically syncs updated membership to the target.