"core update" meaning in English

{
  "forms": [
    {
      "form": "core updates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "core update (plural core updates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Google",
          "orig": "en:Google",
          "parents": [
            "World Wide Web",
            "Internet",
            "Computing",
            "Networking",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Internet",
          "orig": "en:Internet",
          "parents": [
            "Computing",
            "Networking",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Marketing",
          "orig": "en:Marketing",
          "parents": [
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2020, Damian Ryan, Understanding Digital Marketing […], Kogan Page Publishers, page 271",
          "text": "For example, in June 2018 a core update rolled out video carousels in search results, giving the likes of YouTube immediate spikes in their rankings.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A significant change to Google's search algorithms and systems."
      ],
      "id": "en-core_update-en-noun-dkp8X2Fm",
      "links": [
        [
          "SEO",
          "search engine optimization"
        ],
        [
          "Google",
          "Google"
        ],
        [
          "algorithm",
          "algorithm"
        ]
      ],
      "raw_glosses": [
        "(SEO) A significant change to Google's search algorithms and systems."
      ]
    }
  ],
  "word": "core update"
}

{
  "forms": [
    {
      "form": "core updates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "core update (plural core updates)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "English countable nouns",
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        "en:Google",
        "en:Internet",
        "en:Marketing"
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      "examples": [
        {
          "ref": "2020, Damian Ryan, Understanding Digital Marketing […], Kogan Page Publishers, page 271",
          "text": "For example, in June 2018 a core update rolled out video carousels in search results, giving the likes of YouTube immediate spikes in their rankings.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A significant change to Google's search algorithms and systems."
      ],
      "links": [
        [
          "SEO",
          "search engine optimization"
        ],
        [
          "Google",
          "Google"
        ],
        [
          "algorithm",
          "algorithm"
        ]
      ],
      "raw_glosses": [
        "(SEO) A significant change to Google's search algorithms and systems."
      ]
    }
  ],
  "word": "core update"
}