Everybody is a salesman!

Copywriting is the ability to use words to convince and to persuade people to buy into your idea, to buy your products and pay for your services.

Everybody is a salesman; we've successfully convince people to do what seems right to us; to buy the brand we are using. Many people have promote products they don't even know the producer.

If you've successfully convince your friends to visit a mall or to buy a particular product, you're a copywriter. Copywriting skill is an inbuilt ability that needs to be developed; every individual has the ability to convince another person to believe in their idea (buy a product, pay for a service).