"how's it" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase",
        "head": "how's it?"
      },
      "expansion": "how's it?",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
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      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "name": "English greetings",
          "parents": [],
          "source": "w"
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          "parents": [],
          "source": "w"
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          "source": "w"
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      "examples": [
        {
          "ref": "2015 September 1, James Roy, Billy Mack's War, Univ. of Queensland Press, →ISBN:",
          "text": "\"How's it?\" Stan asked. He looked like he was having real trouble focusing his eyes, and he smelt very strange. 'It's all right, Stan,' Granddad replied. 'What's up?' 'Had any more news there, boss?' Granddad didn't look up.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of how's it going."
      ],
      "id": "en-how's_it-en-phrase-nRd6oKhm",
      "links": [
        [
          "how's it going",
          "how's it going#English"
        ]
      ],
      "raw_glosses": [
        "(rare) Synonym of how's it going."
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "how's it going"
        }
      ],
      "tags": [
        "rare"
      ]
    }
  ],
  "word": "how's it"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase",
        "head": "how's it?"
      },
      "expansion": "how's it?",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
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        "Pages with 1 entry",
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      "examples": [
        {
          "ref": "2015 September 1, James Roy, Billy Mack's War, Univ. of Queensland Press, →ISBN:",
          "text": "\"How's it?\" Stan asked. He looked like he was having real trouble focusing his eyes, and he smelt very strange. 'It's all right, Stan,' Granddad replied. 'What's up?' 'Had any more news there, boss?' Granddad didn't look up.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of how's it going."
      ],
      "links": [
        [
          "how's it going",
          "how's it going#English"
        ]
      ],
      "raw_glosses": [
        "(rare) Synonym of how's it going."
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "how's it going"
        }
      ],
      "tags": [
        "rare"
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    }
  ],
  "word": "how's it"
}