Proofreading (also proof-reading) is the reading of a galley proof or computer monitor to detect and correct production-errors of text or art. Proofreaders are expected to be consistently accurate by default because they occupy the last stage of typographic production before publication. wikipedia.org

Customer relationship management (CRM) is a widely implemented strategy for managing a company's interactions with customers, clients and sales prospects. wikipedia.org

Public relations (PR) is the practice of managing the flow of information between an organization and its publics. Public relations provides an organization or individual exposure to their audiences using topics of public interest and news items that do not require direct payment. wikipedia.org

Brand is the name, term, design, symbol, or any other feature that identifies one seller's product distinct from those of other sellers

Marketing communications (MC) uses different marketing channels and tools in combination: Marketing communication channels focuses on any way a business communicates a message to its desired market, or the market in general. A marketing communication tool can be anything from: advertising, personal selling, direct marketing, sponsorship, communication, promotion and public relations. wikipedia.org

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