An article is a written work published in a print or electronic medium. It may be for the purpose of propagating the news, research results, academic analysis or debate. wikipedia.org

Content strategy refers to the planning, development, and management of content, written or in other media. wikipedia.org

Keyword research is a practice used by search engine optimization professionals to find and research actual search terms people enter into the search engines when conducting a search. wikipedia.org

Content marketing is a form of marketing focused on creating, publishing and distributing content for a targeted audience online. wikipedia.org

SEO content is any content created with the goal of attracting search engine traffic. wikipedia.org

Professional writing involves the use of clear language to convey information in a way that is easily understood by the intended audience. Individuals who can use language well may be employed as full-time professional writers in a variety of communications-related occupations, such as wikipedia.org

Copywriting is the use of words and ideas to promote a person, business, opinion or idea. wikipedia.org

Advertising is a form of communication used to encourage or persuade an audience (viewers, readers or listeners) to continue or take some new action. wikipedia.org

Business English is English language especially related to international trade. It is a part of English for Specific Purposes and can be considered a specialism within English language learning and teaching; for example, the teachers' organisation IATEFL has a special interest group called BESIG wikipedia.org