Sven

<p><a href="http://omaxis.de/wordpress-plugins/wp-open-graph-meta/" title="Deutsche Beschreibung von WP Open Graph Meta" rel="nofollow ugc">Zur deutschen Beschreibung des Plugins</a></p>
<p>This plugin adds several Open Graph Meta Elements to the header of your theme for blog posts and pages to avoid no thumbnail, wrong title / description issue etc. It is compatible with the WordPress SEO plugins “wpSEO” and “All in One SEO Pack”. When a title or description is stored by one of these SEO plugins, WP Open Graph Meta will use them.</p>
<p>The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to allow any web page to have the same functionality as any other object on Facebook.</p>
<p>To turn your posts and pages into graph objects, the plugin adds the following meta elements to webpage header:</p>
<h4>For post/page</h4>
<ul>
<li>og:title – The title of your post/page (compatible with “wpSEO” and “All in One SEO Pack”)</li>
<li>og:type – The type of your post/page. Depending on the type it is possible to specify automatically other properties.</li>
<li>og:url – The canonical URL of your post/page</li>
<li>og:description – The excerpt of your post/page (compatible with “wpSEO” and “All in One SEO Pack”)</li>
<li>og:site_name – The title of website.</li>
<li>og:locale – The locale these tags are marked up in.</li>
<li>og:image – An image URL (featured image if exists) which should represent your post/page</li>
</ul>
<h4>For post only</h4>
<ul>
<li>article:tag – Tag words associated with your post.</li>
</ul>
<p>Plugin support page: <a href="http://omaxis.de/wordpress-plugins/wp-open-graph-meta/" title="omaxis - online marketing expertise" rel="nofollow ugc">omaxis.de</a></p>
<h3>Languages</h3>
<p>WP Open Graph Meta is language independent.</p>


WP Open Graph Meta

Adds Facebook Open Graph Meta Elements to blog posts/pages to avoid no thumbnail, wrong title/description issue etc.

Syed Ebraiz Ali Chishti

<p>This is a free plugin for adding meta tag on each post of your website, this meta tags include title, description, image, author, post URL and site name of your published post which later helps while sharing post on social media and for search engines to recognize the post. If you have no featured image on your post, it will also ask for a default image for metadata, which can be set through settings page. Meta tags are invisible from the front-end, but can be viewed from the source code. Meta tags has a great importance in SEO (Search Engine Optimization) and Google Page Rank.</p>
<p>Major features of Add Metadata include:</p>
<ul>
<li>Automatically get post title, description, image, author, url, site name from the post and uses them as a meta tags.</li>
<li>Allow us to set default image for metadata which can use if no featured image found on the post.</li>
<li>Allow us to customize the css and js file.</li>
</ul>
<p>PS: You don’t need any API key or Serial key to use it, because Add meta data are free to use.</p>


Add Metadata

This Plugin adds meta tags on each post of your website and allow us to set default image for metadata, if no featured image found on your post.

WP Open Graph Meta vs Add Metadata