This document provides an overview of social network analysis (SNA). SNA is not just a methodology but a unique perspective that focuses on relationships between individuals, groups, and institutions rather than individuals alone or macro social structures. Practical applications of SNA include improving communication in organizations, identifying criminal networks, and recommending friends in social networks. The document outlines key SNA concepts like representing networks as graphs, identifying strong/weak ties, central nodes, and measures of network structure such as cohesion, density, and clustering.