“Work” is a general term that refers to all activities that one does while “Job” is more specific.
JOB: an activity that an individual performs in exchange for a specific fee or payment. Also called a profession or an occupation.
We use “job” to talk about the specific position someone has at a company.
My job is too stressful, so I’m looking for another one.
The word Job is a Countable Noun:
I worked two jobs so that I could pay off my student loans faster.
Mark has had seven jobsin the past five years.
WORK: is defined as “a physical or mental activity that is performed in order to accomplish or produce something.
“Work” refers to general efforts and activities done to accomplish a goal.
We use “work” with the following expressions: go to work, get to work, arrive at work, get off work, leave work, finish work, and take off work. We cannot use “job” with these expressions.
Example:
I have a lot of work to do tomorrow
You can say you work at/for (a company): “I work at General Motors.”
You can say you’re working on (a project/task): “I’m working on a market analysis”
You can say you work with (people/objects): “I work with special needs children”
The word Work is an Uncountable Noun, so it is not used in the plural:
I have some work to do (some tasks/activities)
What’s your job? Where do you work?
Can you give us an example sentence using Job/Work in the comments?