A well-defined, mature Definition of Done (DoD) ensures that all aspects of a user story are completed, tested, reviewed, and integrated into the codebase. This sequence includes all necessary steps:
Unit testing ensures the code works as expected.
Meeting the acceptance criteria ensures that the business needs are met.
Business testing and functional testing confirm the product works from both the business and technical perspectives.
Code merging ensures that the feature is integrated into the main branch.
Updating documentation ensures that the product is well-documented for future reference and use.