What is the main advantage of using the Streaming API?

The main advantage of using the Streaming API is that it reduces the need for polling by providing real-time updates. This enables applications to receive notifications about changes to Salesforce data as soon as they happen, eliminating the overhead and latency associated with frequent polling. For instance, instead of constantly checking the server for updates, an application can maintain an open connection that listens for notifications, leading to more efficient use of resources and immediate response to changes in data.

This capability is particularly beneficial in scenarios where timely updates are crucial, such as in collaborative applications or dashboards that need to reflect real-time information without delays. By leveraging the Streaming API, developers can create responsive applications that provide users with the most current data available without the unnecessary load and complexity of regular polling mechanisms.