Online social networks, despite their user-friendly facade, rely on a complex infrastructure. This hidden world consists of massive server farms storing user data and content. Powerful networks carry information, ensuring smooth connections. Software programs manage user interactions, content delivery, and security. Algorithms, the invisible hand, curate feeds, personalize experiences, and target advertising. Understanding this infrastructure sheds light on the power and reach of social networks, while also highlighting challenges like data storage, security, and content moderation