Capital budgeting is a crucial process for evaluating long-term investments in companies. It involves analyzing potential projects to determine their financial viability and return on investment, considering factors like initial costs, cash inflows, timelines, and risks. This process helps companies make informed decisions about expansion, acquisitions, and R&D investments. It plays a vital role in allocating resources efficiently, maximizing shareholder value, and ensuring sustainable growth while mitigating potential risks associated with long-term investments.