Social media has become a critical driver of innovation in modern libraries, transforming their traditional roles and expanding their reach. This article examines the impact of social media on library practices, highlighting how platforms such as Facebook, Twitter, Instagram, and TikTok facilitate enhanced outreach, community building, and digital engagement. Social media enables libraries to connect with patrons in novel ways, promote digital literacy, and adapt their services to meet evolving needs. By leveraging these tools, libraries are able to experiment with innovative programming, gather valuable feedback, and collaborate with a diverse array of partners. This paper explores the integration of social media in libraries through case studies and trends, demonstrating how these digital platforms are reshaping libraries into dynamic centers of community interaction and learning. The findings underscore the pivotal role of social media in driving library innovation and its potential to further enhance the accessibility and relevance of library services in the digital age.