mapped_pages:
Promotes selected documents to rank higher than those matching a given query. This feature is typically used to guide searchers to curated documents that are promoted over and above any "organic" matches for a search. The promoted or "pinned" documents are identified using the document IDs stored in the _id field.
GET /_search
{
  "query": {
    "pinned": {
      "ids": [ "1", "4", "100" ],
      "organic": {
        "match": {
          "description": "iphone"
        }
      }
    }
  }
}
pinned [pinned-query-top-level-parameters]ids
:   (Optional, array) Document IDs listed in the order they are to appear in results. Required if docs is not specified.
docs
:   (Optional, array) Documents listed in the order they are to appear in results. Required if ids is not specified. You can specify the following attributes for each document:
`_id`
:   (Required, string) The unique [document ID](/reference/elasticsearch/mapping-reference/mapping-id-field.md).
`_index`
:   (Optional, string) The index that contains the document.
organic
:   Any choice of query used to rank documents which will be ranked below the "pinned" documents.
If you’re searching over multiple indices, you can pin a document within a specific index using docs:
GET /_search
{
  "query": {
    "pinned": {
      "docs": [
        {
          "_index": "my-index-000001", <1>
          "_id": "1"
        },
        {
          "_id": "4" <2>
        }
      ],
      "organic": {
        "match": {
          "description": "iphone"
        }
      }
    }
  }
}
1 from my-index-000001 will be the first result._index is missing, all documents with id 4 from the queried indices will be pinned with the same score.