“What do you do?”
What do you do? is a fixed question about someone's occupation. To ask about an action happening now, use What are you doing?, as in A1-15. Kate answers with her occupation: I'm a nurse.
A1-43 / CEFR A1 / EPISODE 43
Introducing yourself to a new neighbor
SceneIn the apartment corridor.

WORDS & CONTEXT
What do you do? is a fixed question about someone's occupation. To ask about an action happening now, use What are you doing?, as in A1-15. Kate answers with her occupation: I'm a nurse.