This innovative book presents an original account of the principles of conformational theory. It has a strong focus on computational methodologies for conformational space exploration. By revisiting basic conformational conventions, considering experimental results which are often misinterpreted by organic chemists, and qualitatively analyzing the potential energy surface, the book helps non-experts to understand molecular flexibility at the level required in contemporary research. The book shows synthetic organic chemists how to perform successful conformational studies using widespread calculation packages ('click computational chemistry') instead of being misguided by textbook-based conformational analysis. The monograph actually offers to synthetic chemists a new research tool that can significantly upgrade their ability to predict, or at least explain, regioselectivity and stereoselectivity in their own reactions.