When you build a static website with a few separate HTML files you find it easy to optimize each page for search engines, load times and meta information. When using a template based application like WordPress, this kind of customization is a bit trickier. But with a few good hacks you’ll be able to easily optimize each page for your needs.
The Problem: WordPress uses the same meta data for each page. The solutions is simple, though:
<?php
//if single post then add excerpt as meta description
if (is_single()) {
?>
<meta name="Description" content="<?php echo strip_tags(get_the_excerpt($post->ID)); ?>" />
<?php
//if homepage use standard meta description
} else if(is_home() || is_page()) {
?>
<meta name="Description" content="whatever your blog/site is...