Importance of Business Document

Some say we worry far too much about business documents and the correctness of those documents. Argue for or against the importance of making sure all business writings [presentations, memos, emails, letters, reports, etc] are error-free and do not contain slang, misspellings, text abbreviations, or informal formatting? In addition to your argument, include three things you can recommend to your fellow students regarding proper grammar and the formatting of business communications