縮圖程式碼有問題 - Facebook

Inferred Property：
The 'og:title' property should be explicitly provided, even if a value can
be inferred from other tags.

Inferred Property：
The 'og:description' property should be explicitly provided, even if a value
can be inferred from other tags.

請問為什麼會顯示這樣的警告??

有人可以幫我解答嗎

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