Your source data field (Term) supplies the items (2238, etc.) that serve as individual pages (views) in your pivot-table report. This page is term 2238.
Your source data field (Session) supplies the items (1, 8W1, 8W2) that serve as pivot-table column labels.
Your source data field (Subject) supplies the items (ACCT, BLAW, BUSI, etc.) that serve as pivot-table row labels.
Your source data field (Enrolled) supplies the items that serve as the values (data) to be aggregated (using Sum in this case).
* Microsoft let the trademark on PivotTable (as one word) expire in 2020. So I have been rendering the term on occasion as two words.