The key elements to include in a pitch deck to attract investors are a compelling executive summary, a clear problem statement, a unique value proposition, a detailed market analysis, a competitive analysis, a well-defined business model, a comprehensive financial plan, a demonstration of traction and milestones, a strong team overview, and a compelling call to action. By incorporating these elements into your pitch deck, you can effectively communicate your business idea, showcase its potential, and capture the attention and interest of potential investors.