/trænˈzækʃənəl/

Transactional refers to exchanges based on quid pro quo, where interactions are driven by mutual, often explicit, benefit and “scorekeeping” of actions. It applies to business (sales, finance) and personal relationships, prioritizing efficiency and tangible outcomes. Key elements include clear expectations, performance rewards, and potential resentment if reciprocity is lacking.

relating to buying and selling:
You can download all your transactional information on your credit cards and bank account.
transactional charges/costs/fees Customers must be made aware of the transactional charges associated with their purchases.