HTML: Meta tags Twitter & FB Opengraph

gistfile1.txt

// facebook image minimum resolution 1200x630, twitter < 1mb
<meta property="og:title" content="European Travel Destinations">
<meta property="og:description" content="Offering tour packages for individuals or groups.">
<meta property="og:image" content="http://euro-travel-example.com/thumbnail.jpg">
<meta property="og:url" content="http://euro-travel-example.com/index.htm">
<meta name="twitter:card" content="summary_large_image">

// non-essential, but recommended
<meta name="og:site_name" content="European Travel, Inc.">
<meta name="twitter:image:alt" content="Alt text for image">

// fb & twitter app id's
// https://developers.facebook.com/docs/platforminsights/domains
// https://dev.twitter.com/cards/analytics
<meta property="fb:app_id" content="your_app_id" />
<meta name="twitter:site" content="@website-username">