PostgreSQL CDC provides several methods to track real-time data changes in databases, simplifying and enhancing data management. It captures modifications like inserts, updates, and deletes, and stores them for analysis or replication, improving data accuracy and maintaining consistency across various systems. Traditional methods of data synchronization often fall short in a real-time environment, but PostgreSQL CDC is a modern alternative that captures change events in real-time, keeping downstream systems always in sync with the database. It enables efficient implementation of use cases requiring access to change events, such as audit or changelogs, without modifying application code, and facilitates the creation of architectures that support efficient data propagation. Various methods for setting up PostgreSQL CDC include logical replication, triggers, query-based CDC, write-ahead logging, and table differencing, each with its pros and cons. To choose the right method, assess organizational needs and complexities, and decide based on the functionalities provided by each CDC option.