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Hi Kmanikanta - there are different data validation techniques and how they can be implemented in Power BI to ensure data quality and accuracy. Like example , 

1. Compare Source Data with Imported Data 

2. Ensure Correct Data Types

3. Validate Relationships Between Tables

4. Verify Data Within Expected Ranges

5. Row and Column Completeness

6. Identify and Remove Duplicates

7. Validate Against Business Rules

8. Validate Summaries Against Known Totals

9. Monitor KPIs for Anomalies

10. Monitor Refresh Status

 

These techniques helps, I hope this gives an idea.