igraph is a comprehensive, open-source software library designed for the creation, manipulation, and analysis of complex network graphs. Widely used in academia and industry, igraph offers efficient tools for handling large networks with millions of nodes and edges. It supports a variety of programming languages, including R, Python, and C/C++, allowing users to perform advanced network analysis tasks such as community detection, centrality measurement, and shortest path calculation. The library is particularly well-suited for researchers and data scientists who require scalable solutions for network modeling and analysis.