Growth Theory is an economic concept that explains how a country's economy can expand over time. It focuses on factors like capital accumulation, technological innovation, and labor force growth that contribute to increased productivity and output. By understanding these elements, policymakers can create strategies to foster sustainable economic development. There are different models within Growth Theory, such as the Solow-Swan model and endogenous growth theory. The Solow-Swan model emphasizes the role of external factors, while endogenous growth theory highlights how investments in human capital and innovation can drive long-term growth. Both approaches aim to understand and enhance economic performance.