Navigate to Engage and click on Audience
Note: if you do not see Audience, you may not have Admin permissions.

Click Create New

Give your Audience a Name

Choose the Member Type. This is an important step as the destinations that are available to you will be different depending on if you choose people or account. If you choose people, you are electing to sync  people to a third party platform. If you choose accounts, you are electing to a third party platform.

Lastly, click Create Audience.

Congrats! You've successfully created an automation. Now it's time to define your selector.