The document discusses 5 silent business communicators that negatively impact a business: 1) dumb smartphone use during meetings, 2) ignored business emails, 3) poor time management like lateness and missed deadlines, 4) negative body language, and 5) failing to disclose important information or address customer complaints. These "silent killers" can undermine a business by sending negative messages and losing customers' trust if not properly managed. The document encourages businesses to be aware of these issues and ensure their communication is effective.