The Drupal ECA (Events, Conditions, Actions) System is a powerful tool for automating workflows within Drupal. With ECA, complex processes can be configured without deep diving into the code. It resembles other rule engines like IFTTT (If This Then That) or Zapier but is specifically designed for the Drupal environment.
The principle is simple: an event triggers, specific conditions are checked, and if these are met, one or more actions are executed. This enables the automation of processes that previously had to be handled manually or through custom code.