Several tools assist in validating data migration accuracy and completeness:A. Salesforce Reports and Dashboards enable comparisons of data metrics between the legacy system and Salesforce.B. Data Compare tools like Informatica PowerCenter provide deep analysis capabilities for identifying discrepancies and integrity issues.C. Validation Rules within Salesforce ensure that incoming data adheres to specific formats and constraints, preventing incorrect data entries.Employing these tools collectively ensures a thorough validation process for migrated data, securing data integrity and accuracy.

References: https://help.salesforce.com/articleView?id=reports_dashboards_overview.htm