dansnet

Dansnet Meta Tag is a lightweight plugin that allows you to generate HTML metadata to provide information for search engines like Google.
The tag provides metadata about the HTML document. Metadata will not be displayed on the page, but will be machine parsable. 
Meta elements are typically used to specify page description, keywords, author of the document, last modified, and other metadata. 
The metadata can be used by browsers (how to display content or reload page), search engines (keywords), or other web services. 
For backwards compatibility, if this section is missing, the full length of the short description will be used, and 
Markdown parsed.
This plugin supports following tags:
<ul>
<li>“description” defines keywords for search engines</li>
<li>“keywords” define a description of your web page</li>
<li>“author” defines the author of a page</li>
<li>“robots” defines if your web page should be indexed or not</li>
</ul>
Meta tag settings can be found on the general settings page from your Worpress installation.

Dansnet Meta Tag

Dansnet Meta Tag is a lightweight plugin that allows you to generate HTML metadata to…

Philipp Speck

This plugin will give you the ability to use the <code>excerpt</code> as <code>meta description</code> for any post or page. From now you are able to control the description of your site which will be displayed on the search engine results pages. 
By activation the plugin enables the excerpt for static edit pages in admin area.
Related Links
<ul>
<li><a href="http://www.typomedia.org/wordpress/plugins/wordpress-meta-description/" title="Homepage of WordPress Meta Description" rel="nofollow ugc">Homepage</a></li>
<li><a href="https://wordpress.org/extend/plugins/wordpress-meta-description/changelog/" title="Changelog for WordPress Meta Description" rel="ugc">Changelog</a></li>
<li><a href="https://wordpress.org/extend/plugins/wordpress-meta-description/faq/" title="FAQ for WordPress Meta Description" rel="ugc">Questions</a></li>
<li><a href="http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=35264#1" title="Create good meta descriptions" rel="nofollow ugc">Information</a></li>
</ul>
Note: 
Before installing or upgrading new plugins, please backup your database first!

WordPress Meta Description

With this plugin you can control the text which will be shown as description on the search engine results pages.

Dansnet Meta Tag vs WordPress Meta Description