一个SEO友好的robot.txt配置

如题

<meta charset="utf-8">
 
<meta content="ie=edge" http-equiv="x-ua-compatible">
<meta content="width=device-width, initial-scale=1" name="viewport">
 
<meta name="robots" content="index, follow" />
 
<meta name="slurp" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1" />
<meta name="bingbot" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1" />
<meta name="googlebot" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1" />
<meta name="yandexbot" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1" />
<meta name="baiduspider" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1" />
 
<meta property="og:site_name" content="{{PORTAL_NAME}}" />