What is the difference between marketing and selling?

This is a
good question. I can see where you confusion is. While there is some overlap between sales and
marketing, there are two important differences.

First, marketing takes place
way before sales. To be able to sell a product or service, there is a lot other work that goes
on. For example, you will need to price things in an appropriate way. You will need to do
research on what products or services people want and how much they would be willing to pay.
Also you would need to know things like the competition, so that a company can actually sell
something and make a profit.

Second, marketing does not end with selling a
product. Marketing does not merely want to make a sale, it wants to create loyal
customers.