Which feature allows categorization of events based on search terms?

The feature that allows categorization of events based on search terms is known as event types. Event types in Splunk are used to group similar events together based on specific criteria derived from search terms. This feature enables users to create a label or classification for various events that share common characteristics, making it easier to analyze and retrieve related events.

When you define an event type, you typically specify a particular search string that identifies events which should belong to that category. This categorization can then be utilized in searches, reports, and dashboards to streamline the process of analyzing related data.

The other options, while related to data management in Splunk, serve different purposes. Groups are often involved in user management and permissions, tags help in labeling events with keywords for easier searching and sorting but do not categorize events in the same structured way, and macros are reusable expressions in searches that do not focus on categorizing events directly.