A. What do you do?

People can ask what job you do in different ways; you can answer in different ways.

B. What does that involve?*

James and Emma are business consultants [people who help others in a particular area]. They advise people who want to set up [start] a business, especially in health and fitness. James deals with the marketing [does the work in marketing; syn handle], while Emma is responsible for [in control of; syn in charge of] products [things that people make/produce] such as towels, equipment, beauty products, etc.

Common mistakes

I have a lot of work to do. (NOT I have a lot of ~~works~~ to do.)
She advises me. (NOT She ~~advices~~ me.) BUT She gives me advice. (NOT She gives me ~~advise~~.) My job involves a lot of travel. OR My job involves travelling. (NOT My job involves ~~to travel~~.)

Amy is a manager in a veterinary surgery. She runs [organises or controls] the day-to-day [happening every day] business of the surgery and is in charge of a small team: three receptionists, an accounts manager and a secretary. Her work involves a lot of admin [short for administration] such as buying food, medicine and equipment; she also handles any complaints that customers make. [when customers complain / say that something is wrong or is not satisfactory]

^* What do you have to do exactly?

C. Pay

Most workers are paid [receive money] every month; this is called a salary. Your income is the total amount of money you receive in a year. This might be money from one job; it might be money from two jobs. We can express this in different ways:
My income is about £25,000. OR I earn/make about £25,000 a year [every year].
Some of that income you can keep, but some goes to the government; in the UK this is called income tax, e.g. I lose 20% of my income in income tax.

Language help

A salary is money paid to professional people, e.g. doctors or teachers, and to office workers for the work they do, and is usually paid into a person’s bank account every month. Wages are usually paid for each hour/day/week of work to people who do more physical jobs, e.g. building or cleaning.

D. Conditions*

Most people work fixed hours [always the same], e.g. 9 am to 5.30 pm. We often call this a nine-to-five job. Other people have to do/work overtime [work extra hours]. Some people get paid for overtime; others don’t. Some people have good working conditions, e.g. nice offices, paid holidays, extra time off [not at work] for a new mother and father when a baby is born, etc. There is also a minimum wage [an amount of money workers receive, and employers cannot pay less than this].

^* the situation in which people work or live