Copywriting is the art of crafting compelling written content with a specific purpose: to engage and persuade potential customers into taking action. It’s a fundamental part of marketing and advertising that includes compelling headlines, slogans, and body text – essentially any written material that conveys a message designed to inform or influence.
See also: Sales copy, Technical Copywriting, Direct Response Copy
Further reading: The Different Types of Copywriting Services, Writing for the Web – Content Guidelines for Better Engagement