Answer:
think about and/or write down details about your character's personal traits.
Step-by-step explanation:
since it says 'personal' traits this can probably range from physical traits (eye color, hair color, skin color, height, etc) to then being things like age, profession, etc.
if it is meaning personality traits then it means things like energetic and bubbly, or stoic and quiet. things like that, describing how a person acts.