A cash flow statement is a financial statement detailing a company's cash inflows and outflows from operations, investments, and financing activities, culminating in net cash flow. It consists of three main sections: cash flow from operations, cash flow from investing, and cash flow from financing, each providing insights into different aspects of a company's financial health. The cash flow statement is more comprehensive than a fund flow statement, which focuses solely on working capital, making it crucial for assessing liquidity and forecasting future cash flows.