What does these Splunk source mean

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1

Our Jenkins is configured to send the below to Splunk and is working fine.

"splunkConfig": {
    "enabled": "true",
    "events": [
      {
        "datasource": "Build Event",
        "keyname": "Index",
        "value": "jenkins"
      }
    ],
    "host": "xx.xxx.xx.xxx",
    "port": 8088,
    "splunkAppUrl": "https://our splunk url/en-US/app/splunk_app_jenkins/",
    "token": "whatever"
  }

On Splunk side, we see sourcetype is json:jenkins.

We see 5 source, can someone explain what they are and what they do?

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Our Splunk folks said these are directories in Jenkins but we are unable to find them.

Thank you.