Why are search macros important in improving efficiency in Splunk ES?

Search macros are critical components in Splunk ES that contribute significantly to improving efficiency, particularly when dealing with complex queries. By allowing users to define and reuse common search strings with a simple macro name, they streamline the search process. This means that instead of repeatedly writing out long or complex queries each time a search is executed, users can reference the macro, which simplifies the search syntax and reduces the potential for human error.

When a search macro is invoked, it automatically expands into the full search string that it represents, leading to faster execution times since these queries can be optimized or pre-processed within the macro itself. This speeds up search operations, enables users to focus on analyzing results rather than writing or rewriting complex queries, and ultimately enhances the overall user experience in Splunk ES.

In contrast, while other options involve functionalities that could support users or team dynamics, they do not directly relate to the efficiency gains provided by search macros in the context of executing searches and optimizing performance. For instance, default dashboards, collaboration on queries, and automated reporting serve other purposes that, while beneficial, do not enhance the execution speed of complex search queries as search macros do.