Working Capital refers to the capital available for conducting day-to-day business operations. It is calculated as current assets minus current liabilities. The document discusses various aspects of working capital including its components, types, importance, determinants and approaches to estimating working capital needs. There are different approaches to determining working capital requirements like industry norm approach, economic modeling approach and strategic choice approach. Key determinants include the nature of business, production and business cycles, credit and production policies, growth plans and profit levels. The goal is to ensure sufficient liquidity to meet operational expenses and maturing short-term debt obligations.