The webinar discusses 5 common mistakes made by first-time home buyers, including not setting a budget, not doing research on neighborhoods and resale values, waiting for home prices to drop instead of buying now at low interest rates, skipping home inspections, and picking the wrong real estate agent. The presenter, Arjun Dhingra, has 8 years of lending experience and specializes in assisting first-time buyers through the home buying and financing process.