Event sourcing is a data persistence strategy that captures the full history of changes to an application’s state as a sequence of events, rather than just storing the current state. This approach allows developers to reconstruct the state of an application at any point in time by replaying these events. Event sourcing is often associated with domain-driven design (DDD) and Command Query Responsibility Segregation (CQRS), as it complements these architectural patterns. While it offers benefits such as an audit trail and improved debugging capabilities, it may not be suitable for all applications, particularly simpler ones where the overhead may outweigh the advantages.