Direct interests are those interests that are directly related to the project, in our case the beauty niche, respectively, and interests will be related to beauty, beauty salons, manicure/pedicure, hair coloring, hair care, etc.
Indirect interests are what the target audience may be indirectly interested in, for example: shopping (online/offline purchases), entertainment/rest, sports, family, etc.
But you shouldn't get too carried away here, since 3-4 interests are enough, otherwise Facebook will narrow the audience and we will not get good results.