What action triggers email notifications to suppliers in Ariba Discovery?

The action that triggers email notifications to suppliers in Ariba Discovery is responding to a supplier's question. When a buyer engages with a supplier by providing answers to their inquiries, it signifies an active interest and communicates that the buyer is considering the supplier for potential opportunities. This interaction prompts an email notification to be sent to the supplier, ensuring they are updated on the status of their query and can proceed accordingly.

In the context of procurement and supplier management, timely communication is vital. Responding to a supplier's question not only facilitates clearer understanding and transparency but also fosters a relationship between buyers and suppliers, which is crucial for successful procurement outcomes. This engagement reflects the buyer's commitment to the supplier's participation in potential business opportunities.

The other options do not trigger notifications in the same way. Actions like saving a supplier or rejecting a proposal may be part of the supplier evaluation process, but they do not involve direct communication or engagement with the supplier that warrants an email notification. Indicating disinterest in a proposal similarly does not necessitate a response, thus not generating an alert for the supplier. This highlights the unique significance of engaging with suppliers through direct responses in Ariba Discovery.