Explore the critical concept of measurement uncertainty in physics through this comprehensive lecture delivered by G. Kripa as part of the Summer School for Women in Physics 2024. Delve into the fundamental principles and practical applications of error analysis in scientific measurements. Learn how to identify, quantify, and report uncertainties in experimental data, enhancing your ability to conduct accurate and reliable physics experiments. Gain valuable insights into statistical methods, error propagation, and the importance of uncertainty in interpreting scientific results. Equip yourself with essential skills for rigorous data analysis and experimental design, crucial for advancing your career in physics research and academia.