Explore the fundamentals of conformal field theory in this comprehensive lecture from the Kavli Asian Winter School on Strings, Particles and Cosmology 2018. Delve into the importance of CFTs, their prevalence in various theories, and the key concepts of the conformal bootstrap technique. Learn about the conformal algebra, primary local operators, operator product expansion (OPE), and the stress tensor. Examine the function of identical scalar operators and gain insights through a detailed Q&A session. Ideal for advanced graduate students, postdoctoral fellows, and researchers in high-energy physics and theoretical physics.