This book covers all possible information regarding Extension Education and Communication which is the need of undergraduate, postgraduate and research students of traditional Universities, Agricultural Universities, Home Science Colleges, Non-Government Organizations and persons working in the process of social development. New reading material as per latest UGC and ICAR syllabus has been incorporated. The focus through this publication is not to replicate already available reading material but to clarify certain basic doubts and prevailing confusions relating to extension education and extension service. The present publication addresses the concerns of students, teachers and activists alike. To them it will be a handbook which could serve as a handy tool for undertaking implementation of development programme. Thus this book is in one go investment with long lasting use.