The Awareness objective is a new objective-driven Meta objective that offers a new way to do old Reach, Brand Awareness and Video Views campaigns (and more).

You cannot use a catalog with these objective since it does not support dynamic ads but only static ones (single or carousel).
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The different use cases are dependent on the performance goal selection:
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To enter the old Reach workflow, just select "Maximise reach of your ads" goal.
To enter the old Brand Awareness flow, just select "Maximise ad recall lift" or "Maximise number of impressions".

To enter the old Video Views flow, select "Maximise 2-second continuous video views" or "Maximise ThruPlay views".