Acceptance Test
In plain terms
Testing whether software meets business requirements.
Going deeper
Acceptance tests verify that the system satisfies agreed criteria from the user's or stakeholder's viewpoint, confirming it's fit for purpose. They validate requirements, not internals.
Under the hood
Often written in business language (BDD/Gherkin); the basis for 'done' from the user's side.
Examples
User acceptance testing, BDD, Cucumber, requirement validation, sign-off.
Think of it like...
Like a customer's final inspection confirming the product does what they ordered.