A successful business is one that has achieved a high level of success in terms of profitability, growth and sustainability. This can be measured by factors such as revenue generation, customer satisfaction, employee retention rates, market share, and return on investment. A successful business also demonstrates strong leadership, effective management practices, innovation, and adaptability to changing market conditions. Ultimately, a successful business is one that has found a way to meet the needs of its customers while generating profits for its owners or shareholders.