What is the importance of ETL(Extract-Transform-Load) Testing?

Below is the mentioned importance of ETL Testing.

Ensure efficient and rapid transfer of data from one system to another.

It also introduces data quality issues during the ETL process. For example, ETL testing can detect and prevent duplicate data and data loss. 

Ensure that the ETL process itself runs smoothly and is unhindered. 

It ensures that all implemented data meet customer requirements and provide accurate output. 

Ensure large amounts of data are completely and securely moved to new destinations.