meta tags for sharing and fixed viewport

meta tags for sharing

  <meta name="twitter:card" content="summary_large_image">
  <meta name="twitter:site" content="[twitter handle]">
  <meta name="twitter:title" content="[title]">
  <meta name="twitter:description" content="[description]">
  <meta name="twitter:creator" content="[twitter handle]">
  <meta name="twitter:image:src" content="[sharing image]">
  <meta name="twitter:domain" content="[domain]">
  <meta itemprop="name" content="[title]">
  <meta itemprop="description" content="[title]">
  <meta name="twitter:description" content="[description]">
  <meta itemprop="image" src="[sharing image]">
  <meta name="description" content="[title]">
  <meta name="twitter:description" content="[description]">
  <meta name="keywords" content="[keywords]">
  <meta name="author" content="[author name]">
  <meta property="og:title" content="[title]">
  <meta property="og:type" content="website">
  <meta property="og:url" content="[url]"/>
  <meta property="og:image" content="[sharing image]"/>
  <meta property="og:site_name" content="[title]">
  <meta property="og:description" content="[title]">
  <meta name="twitter:description" content="[description]">
  <meta property="og:locale" content="en_US" />