This book covers the fundamentals of bacterial volatile-mediated communication with other organisms, starting with the biosyntheses of volatile organic compounds (VOC), interactions with plants and animals, interactions with microbes, tools for data analysis, and their applications. With this foundation in place, the book subsequently focuses on understanding the effect of bacterial volatiles on plant growth promotion, discusses plant immunity, and lastly shares insights into future research directions. The book is divided into fourteen-in-depth chapters, each of which is designed to enrich readers’ understanding of bacterial volatile compounds’ functions and various applications. The pivotal roles of bacterial volatile compounds make this book essential reading for scientists and students of all biological disciplines seeking to fully understand microorganism responses and environmental adaptations. In addition to its value as a fundamental book for graduate students, it offers a clearly structured reference guide for all individuals working in microbiology.