What is a lookup table in Splunk?

A lookup table in Splunk is indeed a CSV file used to enrich event data. This type of table allows you to add additional context to your events by correlating them with external data sources. For example, you can use a lookup table to match IP addresses with geographical locations or user IDs with specific user information. When you perform searches, you can reference these lookup tables to enhance the data being analyzed, making it much more informative and actionable.

These lookup tables can be defined within Splunk, and they allow for various operations during searches, such as the "lookup" command, which can automatically append data from the lookup table to the search results based on keys defined in the table. This capability to enrich event data is crucial for providing deeper insights and performing effective analysis within Splunk.