A cash flow statement shows the changes in cash position of a company over a period of time by outlining cash inflows and outflows from operating, investing, and financing activities. It differs from a funds flow statement, which analyzes changes in working capital and is based on accrual accounting, while a cash flow statement strictly focuses on changes in a company's cash balance on a cash basis. Cash flow statements are more useful for assessing a company's short-term liquidity as they directly track cash inflows and outflows.