A What do you do?
People may ask you about your job. They can ask and you can answer in different ways:
What do you do? What's your job? What do you do for a living?
I’m (+ job) e.g. a baker / an engineer / a teacher / a builder
I work in ( + place or general area) e.g. a bank / marketing
I work for ( + name of company) e.g. Union Bank / ICI / Fiat
B What does that involve? (= What do you do in your job?)
When people ask you to explain your work/job, they may want to know your main responsibilities (= your duties / what you have to do), or something about your daily routine (= what you do every day / week). They can ask like this: What does that (your job) involve?
Main responsibilities:
I’m in charge of(= responsible for) all deliveries out of the factory.
I have to deal with any complaints (= take all necessary action. if there are complaints).
I runthe coffee bar and restaurant in the museum (= I am in control of it /I manage it)
Note: We often use responsible for / in charge of for part of something, e.g. a department or some of the workers; and run for control of all of something, e.g. a company or a shop.
Daily duties / routines
I have to go to / attend (fml) a lot of meetings.
I visit / see / meet clients (= people I do business with or for).
I advise clients (= give them help and my opinion).
It involves doing quite a lot of paperwork (a general word we use for routine work that involves paper e.g. writing letters, filling in forms, etc.). Note the -ing form after involve.