Purpose of Row Level Security
DataSelf Web Browser (Tableau Server OEM) can embed row level security into a data source.
That is, the data that the User sees on a report is pre-filtered according to that User's DataSelf Web Browser login name.
This allows a publisher to create a single master report, but every User sees only the records appropriate to that user.
The following pages offer a template of how to satisfy a common request.
For other needs, contact your DataSelf technician. You can also search Tableau.com and other websites' many support articles and examples.