"where's the beef" meaning in English

{
  "etymology_text": "From a catchphrase in a 1980s television commercial for the fast food chain Wendy's.",
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      "expansion": "where's the beef",
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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
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          "kind": "other",
          "name": "American English",
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          "name": "Terms with French translations",
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      ],
      "glosses": [
        "Where is the content? So what?"
      ],
      "id": "en-where's_the_beef-en-phrase-h-SnKLy3",
      "links": [
        [
          "content",
          "content"
        ],
        [
          "So what",
          "so what"
        ]
      ],
      "raw_glosses": [
        "(US, idiomatic) Where is the content? So what?"
      ],
      "related": [
        {
          "word": "nothingburger"
        }
      ],
      "tags": [
        "US",
        "idiomatic"
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "so what",
          "word": "et alors"
        }
      ],
      "wikipedia": [
        "where's the beef"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-where's the beef.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/6d/En-au-where%27s_the_beef.ogg/En-au-where%27s_the_beef.ogg.mp3",
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    }
  ],
  "word": "where's the beef"
}

{
  "etymology_text": "From a catchphrase in a 1980s television commercial for the fast food chain Wendy's.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "where's the beef",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "related": [
    {
      "word": "nothingburger"
    }
  ],
  "senses": [
    {
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        "American English",
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English phrases",
        "English rhetorical questions",
        "English sentences",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with French translations"
      ],
      "glosses": [
        "Where is the content? So what?"
      ],
      "links": [
        [
          "content",
          "content"
        ],
        [
          "So what",
          "so what"
        ]
      ],
      "raw_glosses": [
        "(US, idiomatic) Where is the content? So what?"
      ],
      "tags": [
        "US",
        "idiomatic"
      ],
      "wikipedia": [
        "where's the beef"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-where's the beef.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/6d/En-au-where%27s_the_beef.ogg/En-au-where%27s_the_beef.ogg.mp3",
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  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "so what",
      "word": "et alors"
    }
  ],
  "word": "where's the beef"
}