+**Test Data** is the collection of information specifically prepared to verify the proper functioning and performance of a system, software, or model. It helps evaluate how well a product works and identify potential errors, ensuring it meets its intended specifications before [Deployment](/wiki/deployment). Distinct from [Training Data](/wiki/training_data), its integrity is paramount for robust validation.
+## See also
+- [Data Validation](/wiki/data_validation)
+- [Quality Assurance](/wiki/quality_assurance)
+- [Software Testing](/wiki/software_testing)
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