This document discusses how B2B buying has shifted to an inbound model where buyers are in control of the process. It outlines the changing buying cycle and how marketing and sales need to work together based on buyer personas. The key aspects are to understand the buyer's journey, answer their questions at each stage through helpful content, capture leads from digital properties, cultivate trust to develop sales-qualified leads, and continue engagement after the sale through customer evangelism. The overall approach is to know the buyer intimately in order to guide them through their decision-making process in a non-intrusive way.