An executive summary should include a concise overview of your business or proposal, the problem or opportunity being addressed, your proposed solution, and the value it delivers—such as cost savings, increased efficiency, or market potential. It should also include key financials or data points, and a clear call to action. The language should be persuasive, tailored to your audience, and free of jargon, offering a snapshot of the most compelling aspects of your full proposal or business plan.