<meta name='yandex-verification' content=' Code from Yandex Webmaster tools'/> 

<link rel="author" href="Google+ Profile URL"> <link href="Google+ Profile URL" rel="Author">

<link rel="publisher" href="Google+ Page URL"> <link href="Google+ Page URL" rel="publisher">

 <meta name="msvalidate.01" content="Code from Bing Webmaster tools"/>

<meta name="norton-safeweb-site-verification" content="Norton Code" />

​<meta name="twitter:card" content="summary"> 
<meta name="twitter:site" content="@TwitterUserName">
<meta name="twitter:title" content="home page meta title">
<meta name="twitter:description" content="write your description here">
<meta name="twitter:image" content="imageUrl.jpg">