indowp

This Plugins that makes your site SEO boosting by making your defaut description change everytime you add new post on homepage only. This plugins usefull for those running news site or you are an up to date blogger. 
Many others SEO Plugins doesnt have this feature, they just make keep static description and makes google bored if you have an up to date blog.
<h4>Features</h4>
<ol>
<li>Automatically generate description on your homepage based on last 3 title post, this is real good for your site SEO.</li>
</ol>

Wp SEO Auto Generating Metatag Description

This Plugins that makes your site SEO boosting by making your defaut description change everytime you add new post on homepage only.

jwilsson

WordPress adds all kinds of <code><meta></code>-tags to the <code><head></code> section of your site. 
Some of these tags are quite good and have real uses, others make sense for some sites and others doesn’t. 
Some tags are even considered a security risk, since they tell the world which version of WordPress you’re currently running.
This plugin allows you to remove all of the <code><meta></code>-tags that WordPress outputs by default. 
You decide on a tag-by-tag basis which tags to remove and which to keep. Nothing’s enforced, you’re 100% in charge.

wp_head() cleaner

Great plugin

Remove unused tags from wp_head() output.

Wp SEO Auto Generating Metatag Description vs wp_head() cleaner