I'm with #4. Effective writers--and I would argue effective readers and speakers and thinkers, as well--are at an advantage in every field. Let's face it, if you can communicate effectively (i.e., make yourself understood in a way which is appropriate to the audience and circumstance and material) you have an inherent edge over those who can't. Effective communication through writing is a life skill.
I would agree with the above posts and add that the best business-person are those who are silvertongues; in our globalized society, this persuasive interaction often takes the form of email/text/social network. As the internet becomes wider, and, as a result, the world becomes smaller, more people interact through written language than ever. Facebook, Google, BlackBerry, SMS, blogs, discussion boards, email, etc. are all written forms of communication that are currently vital to business. The business-person who has the capability to maintain eloquence throughout all written communication is the one who will stand out amongst his/her colleagues.
The above posts all give excellent points and valid reasons. Writing skills are imperative for every professional's toolbox. However, with business, there are letters, memos, reports, presentations, company publications, emails, speeches, press releases, etc. which must be written. They should all be clear, concise, grammatically correct, and fluid. They should engage the attention of the intended audience, fulfill the intended purpose (persuade, inform, entertain, etc.), and they should conclude effectively. The same is true for business emails, advertisements, marketing proposals, five-year plans, and any number of other documents professionals may find themselves having to produce.
I also agree with post #3. When my students complain that they are never going to "use this" in real life - anything pertaining to writing - I try to emphasize that we are not mastering writing. We are mastering written communication. The mastery of written communication logically means that there is some mastery of basic communication - focus, vision, logic, movement, conclusion. These are basic skills necessary to (like post 4 said) to any profession - and anyone who is highly skilled at them is going to be more successful in market competition.
As Post 4 noted, it is important to be a good writer in any professional field. Employees' writing skills represent the companies or organization for which they work, and if they don't demonstrate professional, clear writing, then it reflects poorly on the company.
Most significant is that business calls from one to be at the top of his game and to communicate effectively. If someone cannot write clearly and concisely, he or she might not only cost the company time, but also money.
I agree with the points made in the third post. I don't believe it's necessary for a successful businessman to boast creative writing skills (although it certainly wouldn't hurt). However, I certainly think it's important to present a sound academic background in one's correspondence. Nothing bothers me so much as seeing repeated misspellings in written memos: It shows a weak English background and a lazy attitude toward the written word.
I think one could argue that it is important to be a good writer in any field, not just business. Of course, being able to write clear reports or project proposals that do not beat about the bush or strike off at bizarre tangents is essential, as is the ability to similarly write summaries, reflections and similar documents. As #3 identifies, the key word here is communication - in today's world, arguably, we are all needed to be good communicators, both verbally and on paper.
I would think that there are many reasons. The ones I can think of might be best supplemented by what others suggest. The clarity of vision and expression is something where writing becomes essential. In an increasingly global and competitive marketplace, being able to communicate through writing and speaking how one particular business vision is more worthwhile than others could be the difference between success and failure. Additionally, the fact that there is so much email communication necessitates good writing skills and a polished sense to business. This is also present in the need for web pages, blogs, or other electronic content where communication through language is essential. If we were examining business from the idea that details help to facilitate the professional image, good writing skills are needed there, as well. It might not look very good for a business person to prepare a presentation or memo that is fraught with grammar errors and incoherency in content. For these reasons, I would say that writing in business becomes very important.
Both from the writer's and the client's perspective.
I think a good writer should be reasonably well educated and have creativity, imagination and reasonably good knowledge of his subjects.
He should also have ability to find, process and assimilate good information.
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The word writer can be misleading in the context of business communication. The word writer may give the impression of some one engaged in creative writing such as stories, poems and essays. A manager need to be a good communicator, and communication ability includes proficiency in written communication also. Thus a manager need to produce written communication that are understood by the recipient clearly. In addition, where required these should convincing.
Managers need this kind of written communication skill as in modern business world a lot of communication is required to be done in writing on consideration of convenience and cost. Also written communication are ofter required to have a verifiable or permanent record of some information. These may include offers made, contracts and agreements, and plans and objectives. For example a well written statement of a company's business policies, vision and mission can go a long way in providing desired unified direction to all the employees in the company over an extended period.