Strapi is an open-source headless CMS that utilizes webhooks to facilitate seamless communication between applications by automatically sending HTTP POST requests when specific events occur, such as creating, updating, or deleting content. This automation allows for real-time updates without manual intervention, much like receiving push notifications for new emails. Webhooks serve to notify third-party applications of changes, enabling functionalities like email notifications, website builds, or messaging app alerts. Unlike APIs, which require manual data requests, webhooks run automatically once set up, offering a dynamic method of content exchange across applications. Strapi's interface allows users to easily create, test, and manage these webhooks, with the flexibility to enable or disable them as needed, supporting various integration scenarios.