The All in One SEO Pack WordPress Plugin makes it a simple matter to specify the Meta statements for WordPress blog pages. WordPress may produce generic Meta statements for each page without this very useful plugin.
Search engines may or may not consider Meta statements when listing your sites in the search engine results pages, but if they do wouldn’t you want your blog’s meta data to be the best it can be? Since search engines send traffic to your blog, you should be satisfying those search engines by providing them with the most accurate information about your blog.
To be the most effective Meta statements should be page-specific, so that each page has a meta title, meta description and meta keywords that reflect the content of each page. Using the All in One SEO Pack plugin for WordPress blogs simplifies the creation of post- or page-specific Meta statements.
After you have installed and activated the All in One SEO Pack plugin, scan down the write a new post page and look for the All in One SEO Pack feature. Click on the right-pointing triangle to open this feature.
Fill in your keyword-laden title and description making sure not to get too wordy. List your keywords for that post separated by commas.
If there is some reason to turn off this plugin, you can do it per post by ticking the box next to “Disable on this page/post”.
One nice thing about using Meta descriptions is that search engines may use your carefully written description in the Meta statement, instead of grabbing the first few words of your post, when describing your site in the search results listings.
Use the All in One SEO Pack plugin to entice new site visitors by writing your own Meta statements instead of leaving it up to chance.

Definitely a must have plugin for WP, there must be millions of blogs using All in one SEO pack! I wouldn’t run a blog without this plugin. There are other versions produced by other developers, but have never installed as AIOSP does everything I need