A key feature in Salesforce is the ability to send outbound notifications upon changes to assets - such as Accounts, Contacts, Leads, etc. This can be useful for real-time integrations with external systems.
To implement this feature, as a prerequisite, you should already have a Salesforce Developer account. This can be obtained for free. Also note that only new and modified records can be sent outbound. Deletions cannot be captured.
Attached is a sample pipeline that receives an outbound message from Salesforce and sends a response back.