The creative fields listed in your Focus on your profile are automatically generated based on the creative fields you've used most in projects you've uploaded. As you change or add creative fields to new and existing projects, the Focus will change automatically to reflect the fields of projects you've uploaded. If you don't have any published projects visible to the public, you won't have a focus listed.
If you have more than one creative field used the same number of times, the "tiebreaker" is that the Creative Field you've used most recently on a project will appear.
Click here to learn more about Creative Fields.