What command is used to view fields commonly used across searches in Splunk?

The command used to view fields commonly used across searches in Splunk is the Fields command. This command allows users to explore and list fields extracted from their indexed data and understand their usage patterns. By utilizing the Fields command, users can analyze the fields present in their datasets and see their distributions, helping to identify which fields are frequently utilized in queries.

This command is particularly useful in the context of building searches, allowing users to see available fields, determine field value distributions, and refine their search processes based on the insights gained. The output of the Fields command can aid in improving the relevance and efficiency of searches by focusing on the most impactful fields.

Other options may offer functionalities related to data manipulation or display; however, they do not specifically focus on summarizing field usage across searches like the Fields command does. This is what makes the Fields command the most appropriate choice for this scenario.