suppress

Custom Fields to Meta Tags lets you leverage WordPress custom fields to generate <code><meta></code> tags in your site’s <code><head></code> section.
Simply add a custom field to your post or page with a key that starts with cfmt, and the plugin will automatically turn it into a meta tag.
Example: 
– Custom field key: <code>cfmtdescription</code> 
– Custom field value: <code>Description of the post/page</code> 
– Output in <code><head></code>:
 
<h3>Key Features</h3>
<ul>
<li>Lightweight, zero-configuration – just activate and use.</li>
<li>Prefix-based system (<code>cfmt</code>) to avoid conflicts.</li>
<li>Works with posts, pages, and custom post types.</li>
<li>Useful for creating:
<ul>
<li>Meta descriptions</li>
<li>Author or copyright tags</li>
<li>Custom SEO tags</li>
</ul>
</li>
</ul>
<h3>Why use this plugin?</h3>
Most SEO plugins are heavy and packed with features you may not need. If you only want to generate custom meta tags directly from WordPress custom fields, this plugin is the simplest solution.
No settings page, no bloat — just pure functionality.

Custom Fields to Meta Tags

Use WordPress custom fields (with a prefix) to automatically output SEO meta tags (like description) in the  section of your posts and pages.

VibeThemes

WordPress SEO have never been easier! Vibe SEO Pack is a powerful and easy to use WordPress SEO plugin.
Vibe SEO Pack is not just a regular WordPress SEO tool! By using this plugin you will have your own WordPress SEO adviser right next to you 24/7. You just focus on writing and the plugin will do the SEO audit for each post and give you hints on what you should change in order to achieve best SEO results.
Out of the box solution for those who are not familiar with search engine optimization techniques, just install the plugin and you are ready to go! Intermediate and advanced users can make fine tuning to their websites (nofollow and noindex tags to specific pages and links, set up custom keywords and description to each post, revisit after tag, author tag, an many more).
Author site: <a href="http://www.vibethemes.com/" title="WordPress SEO" rel="nofollow ugc">VibeThemes</a>

Vibe SEO Pack

Vibe SEO Pack is a simple powerful and easy to use SEO tool to optimize your website for search engines without having to edit a single line of code.

Custom Fields to Meta Tags vs Vibe SEO Pack