In many public settings, I have noticed misspellings, grammatical errors and misuse of sentence structure.  When I see a public posting by a company with errors, it makes me think that they are not proud of their work or have a disregard for doing their work correctly.  I lose confidence in that company.  I assume that if their attention to detail in their writing is lacking, then their attention to detail in their business is also sub-par.  That’s where a professional writer can help!