Service-Oriented Architecture (SOA) is a design philosophy that helps organizations exchange information between their applications more successfully. SOA divides resources into self-contained software components called services, which can be accessed remotely. This approach is based on the idea that no single entity can excel at everything. SOA is often implemented using an Enterprise Service Bus (ESB), which manages the flow of traffic between services. The rise of Web Services has contributed to the resurgence of SOA, making it a popular choice for exposing services within organizations.