Seaborn is a powerful data visualization library in Python that builds on top of Matplotlib, enhancing its capabilities and aesthetics. It provides a high-level interface for creating informative and attractive statistical graphics, making it easier for data scientists to explore and understand complex datasets. Seaborn is particularly well-suited for visualizing relationships between variables, offering functionalities such as automatic linear regression plots, multi-plot grids, and various types of distribution plots. Its seamless integration with Pandas data structures allows for efficient data manipulation and visualization, making it an essential tool for anyone working in data science and analytics.