This report examines various business types, including micro, small, medium, and large businesses, detailing their characteristics and examples. It also defines sole proprietorships, partnerships, limited liability partnerships, companies, and cooperatives, highlighting their key features. The report further explores organizational structures, such as flat and hierarchical structures, and their influence on business productivity. It uses Sainsbury as a case study, analyzing the impact of external factors, including political, economic, social, technological, legal, and environmental factors, on business performance. The analysis employs the PESTLE framework to assess these external influences, concluding with a summary of the findings and their implications for business strategy and success. The report emphasizes the importance of understanding business structure, external factors, and their combined effect on a company's operations and profitability.