When Analytics runs a dataflow that accesses Salesforce objects, which user does it use?

What are the steps in the data exploration process?

A client has a dataset comprised of Opportunity data and Opportunity Line level dat a. The client wants to use this dataset with Einstein Discovery to understand the Opportunity win rate.
What must be done to the dataset to achieve this goal?

What is a valid permission for a permission set?

How many concurrent stories per org are allowed?