By default, WordPress do not add a <meta description> tag to your blog. While not necessary, some SEO experts insists that this tag is important for your site SEO. So what about generating one using your post content? Here is a cool piece of code to do it easily.

Paste the following code into your functions.php file:

 function create_meta_desc() {     global $post; if (!is_single()) { return; }     $meta = strip_tags($post->post_content);     $meta = strip_shortcodes($post->post_content);     $meta = str_replace(array("n", "r", "t"), ' ', $meta);     $meta = substr($meta, 0, 125);     echo "<meta name='description' content='$meta' />"; } add_action('wp_head', 'create_meta_desc'); 

Thanks to Paul for this handy snippet!