This document discusses effective business communication and provides key elements of the communication model. It outlines factors for senders (accent, pace, vocabulary), messages (being articulate and logical), mediums (using the appropriate channel like face-to-face or video call), receivers (building rapport and calibrating the communication), and feedback (asking for and keeping the feedback channel open). It also provides tips for different types of business writing like emails (using clear subject lines, summarizing points, and following etiquettes).