For an ETL Developer
ETL stands for Extract, Transform, and Load. ETL job is a function where we need to extract data from any defined data source and put it into another location after applying some data transformation on the collected data. Data lineage can help an ETL developer to trace any bug/error within the ETL job. It also enables us to check for any changes in some of the data fields such as column deletion, renamed or added. It is called Impact Analysis. While dealing with complex reports, it helps in the identification of the data source which should be used in that report.
For a Data Steward
To play the role of a data steward, the person needs to know everything about the data which is being used in an organization. Data lineage helps the person to identify the least and most usable data assets in an ETL job. Data lineage provides transparency to the user who is responsible for that particular data asset.
For a Business User
Data lineage helps a business user to find the reports based on any particular data fields or column. Example: there is some data source that includes data fields named sales and gender if the user needs to find the reports of the bases of these data fields. Data Lineage can help the business user to check whether the data is accurate or not.
For a Troubleshooting Operator
When we need to troubleshoot for any of the wrong reports, lineage can help us to identify which process and jobs are involved in creating that particular report. In the case when we have some failed jobs, data lineage can help us to find the target tables and fields affected which are being used in the reports.