Rob's seminar focused on the grape varieties Chenin Blanc and Merlot. He discussed terroir and how it relates to a wine's sense of place. He also explained the difference between Old World and New World wines, with Old World emphasizing terroir and New World focusing more on varietal expression. Specific details were provided about Chenin Blanc production in regions like the Loire Valley, South Africa, and other top growing areas around the world. Examples of Chenin Blanc wines from producers in France and South Africa were described.