charset
html
<meta charset="UTF-8" />
name
Affects SEO, display and screen readers.
html
<meta name="description" content="some description" />
<meta name="keywords" content="keyword1 keyword2" />
<meta name="author" content="Jufeng Zhang" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
http-equiv
html
<meta http-equiv="content-security-policy" content="default-src 'self'" />