Within the Search & Reporting app, the user is presented with the Summary view, which contains information about the data that the user searches by default. This is an important distinction; in a mature Splunk installation, not all users will always search all data by default. But if this is your first trip into Search & Reporting, you'll see the following:
From the screen depicted in the previous screenshot, you can access the Splunk documentation related to What to Search and How to Search. Once you have at least some data indexed (a topic we'll discuss later), Splunk will provide some statistics on the available data under ...
