What does the Streaming API primarily facilitate?

The Streaming API is specifically designed to enable real-time notifications of data changes, making it the most fitting choice. This capability allows applications to receive updates as soon as data changes occur in Salesforce, without the need for continuous polling. As a result, developers can create applications that respond instantly to changes, which is crucial for scenarios such as updating user interfaces or triggering processes in response to specific events.

In contrast, batch processing of records refers to handling large amounts of data in groups rather than real-time updates, which does not apply to the Streaming API's functionality. Similarly, data manipulation and querying are typically handled by other APIs in Salesforce, such as the REST or SOAP APIs, and do not focus on real-time notifications. Data visualization on dashboards is a feature associated with Salesforce's reporting and analytics capabilities, rather than real-time data change notifications provided by the Streaming API.