This handbook aims to provide a comprehensive introduction and practical guide to nature-inspired optimization techniques, focusing on swarm intelligence and bio-inspired algorithms.This book focuses on solving real-world optimization problems occurring in various domains. It is designed to help engineering students understand the basics of optimization. The book also provides foundational concepts of algorithms such as Swarm Optimization, Ant Colony Optimization, Genetic Algorithms, and others. Additionally, it includes discussions on several case studies to illustrate practical applications of these techniques.