Copywriters, or Marketing Writers, are responsible for producing engaging, clear text for different advertising channels such as websites, print ads and catalogs. Their duties include researching keywords, producing interesting written content and proofreading their work for accuracy and quality.The process of copywriting involves knowing the product, its features and benefits, and understanding the target market and their needs and desires. Copywriters come up with catchy headlines, subheads and body copy to create the advertisement.