This report investigates the relationship between corporate governance and firm performance, focusing on 76 FTSE 100 non-financial companies from 2009 to 2016. The study explores the impact of various corporate governance factors, including board size, CEO duality, and board diversity, on firm performance metrics such as Return on Assets (ROA) and Tobin's Q. Utilizing regression and correlation analysis, the research aims to identify the best areas of corporate governance for companies to focus on for performance improvements. The findings reveal a positive correlation between corporate governance and firm performance, although the influence is not strongly significant. The report emphasizes the importance of considering additional solutions beyond corporate governance enhancements, such as employee training and investment in new machinery, to drive significant firm performance improvements. The research also provides a comprehensive literature review that highlights the importance of corporate governance in attracting investors and ensuring stakeholders' interests are met.