Copywriter

Copywriting is written content conveyed through online media and print materials. Copy is content primarily used for the purpose of advertising or marketing. This type of written material is often used to persuade a person or group as well as to raise brand awareness. The ultimate goal of copy is to get the reader to take a particular action. The goal for a copywriter is to create remarkable content that the reader finds valuable and makes them want to take the recommended action.

Copywriters (known as continuity writers in broadcasting) are used to help create direct mail pieces, taglines, jingle lyrics, web page content (although if the purpose is not ultimately promotional, its author might prefer to be called a content writer), online ads, e-mail and other Internet content, television or radio commercial scripts, press releases, white papers, catalogs, billboards, brochures, postcards, sales letters, and other marketing communications media pages. In book publishing, flap copy and jacket flap copy are terms for the brief summary of a book which often appears on the inside of the book's hardcover dust jacket; back cover copy is similar, often briefer text placed on the book's outside back cover; catalog copy is another book summary maintained in a publisher's catalog of published books. Copy can also appear in social media content including blog posts, tweets, and social-networking site posts.

...
Wikipedia