Copywriting is writing copy for the purpose of advertising or marketing. The copy is meant to persuade someone to buy a product, or influence their beliefs.
Copywriters 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. Copy can also appear in social media content including blog posts, tweets, and social-networking site posts
This thread explains about writing for television.
Copywriters 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. Copy can also appear in social media content including blog posts, tweets, and social-networking site posts
This thread explains about writing for television.