Adding an audience to your Update is an optional, but useful way to reach a more targeted audience.

Option 1. You can send your Update to all portal users by selecting All Portal Users.

Option 2. You can send your Update to a select audience. Click Select Audience and click in the field for Select Audience to display all available filters:

IMPORTANT NOTE: The Select Audience field uses existing Contact filters, as well as User-created Filters. You must have at least one contact filter defined to send an Update. Learn more about how to create a User-Created Filter: User-created Filters: Create a New Contact Filter