: Is "article:tag" meta tag necessary? I just changed my Wordpress theme and I can't find <meta property="article:tag" content=" " /> in my posts and pages metadata. Are they really necessary?

@Karen161

<meta property="article:tag" content="Article Tag" /> is one of the Facebook Open Graph tags. Having social media metadata in the website is one of the best practice as it will tell how our webpage's Title, URL, Image, Description, site_name etc should display while sharing.
But I don't think <meta property="article:tag" content="Article Tag" /> is necessary as it is not in the Standard Open Graph tags

<!-- Open Graph data -->
<meta property="og:title" content="Title" />
<meta property="og:type" content="article" />
<meta property="og:url" content="http://www.example.com/" />
<meta property="og:image" content="http://example.com/image.jpg" />
<meta property="og:description" content="Description" />
<meta property="og:site_name" content="Site Name" />
<meta property="fb:admins" content="Facebook numeric ID" />


Still if you want to add that tag you can add like

<!-- Open Graph data -->
<meta property="og:title" content="Title" />
<meta property="og:type" content="article" />
<meta property="og:url" content="http://www.example.com/" />
<meta property="og:image" content="http://example.com/image.jpg" />
<meta property="og:description" content="Description" />
<meta property="og:site_name" content="Site Name" />
<meta property="article:published_time" content="2015-11-11T19:08:47+01:00" />
<meta property="article:modified_time" content="2015-11-11T19:08:47+01:00" />
<meta property="article:section" content="Article Section" />
<meta property="article:tag" content="Article Tag" />
<meta property="fb:admins" content="Facebook numberic ID" />

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