End-to-end user journeys in testing refer to the complete path a user takes through a software application, from start to finish. This type of testing is essential for validating the functionality and usability of a system as a whole, rather than focusing on individual components in isolation.

Test automation plays a crucial role in efficiently testing end-to-end user journeys, as it allows for the creation of repeatable, automated tests that can simulate real user interactions. By automating these tests, teams can quickly identify any issues or bugs that may arise throughout the user journey, ensuring a seamless and positive user experience.