title: What is _score in ES/Kibana?
body: <p>I have this document in ES and I am looking at it through Kibana. </p>
  
  <p>What does the _score field represent?</p>
  
  <pre><code>{
    "took": 2,
    "timed_out": false,
    "_shards": {
      "total": 11,
      "successful": 11,
      "skipped": 0,
      "failed": 0
    },
    "hits": {
      "total": 1,
      "max_score": 0.2876821,
      "hits": [
        {
          "_index": "order",
          "_type": "ACKNOWLEDGED",
          "_id": "9901234567",
          "_score": 0.2876821,
          "_source": {
            "applicationCode": "SAPS00",
            "orderId": "9901234567",
            "status": "ACKNOWLEDGED",
            "orderUpdatedDateTime": "2018-07-08T10:12:21Z",
            "totals": {
              "orderShippingTaxAmount": 3.5,
              "orderSubtotalTaxAmount": 12.55,
              "grandTotalTaxAmount": 15
            },
            "orderLines": [
              {
                "lineId": "1",
                "unitPriceTaxAmount": 5.45,
                "totalPriceTaxAmount": 10.67,
                "lineShippingTaxAmount": null
              },
              {
                "lineId": "2",
                "unitPriceTaxAmount": 2.45,
                "totalPriceTaxAmount": 8.67,
                "lineShippingTaxAmount": null
              }
            ]
          }
        }
      ]
    }
  }
  </code></pre>