meta 标记描述 HTML 文档中的元数据。它解释了关于 HTML 的其他材料。

<meta charset="utf-8">

<!-- 标题 -->
<title>···</title>
<meta property="og:title"  content="···">
<meta name="twitter:title" content="···">

---

<!-- url -->
<link rel="canonical"       href="https://···">
<meta property="og:url"  content="https://···">
<meta name="twitter:url" content="https://···">

---

<!-- 描述 -->
<meta name="description"         content="网页描述···">
<meta property="og:description"  content="···">
<meta name="twitter:description" content="···">

---

<!-- image -->
<meta property="og:image"  content="https://···">
<meta name="twitter:image" content="https://···">

---

<!-- ua -->
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">

---

<!-- viewport -->
<meta name="viewport" content="width=device-width">
<meta name="viewport" content="width=1024">

---

<!-- 重定向 -->
<meta http-equiv="refresh" content="5;url=http://example.com/">
<meta name="robots" content="index,follow">
<meta name="generator" content="网站生成工具">
<meta name="csrf-token" content="token值">