How to Remove

You can modify the default Magento page meta tags by customising the phtml in the head.phtml file of your theme at

app/design/frontend/YOURTHEME/default/template/page/html/head.phtml

For example to modify the meta description for a product you could do something like :

<?php
$_metaDescription='';
if (Mage::registry('current_product'))
{
  // auto generate meta description
if (strip_tags(Mage::registry('current_product')->getDescription())=="")
{
    $_metaDescription=htmlspecialchars($this->getDescription());
} else {
      $_metaDescription=strip_tags(Mage::registry('current_product')->getDescription());
}
} else {
     $_metaDescription=htmlspecialchars($this->getDescription());
}
?>
<meta name="description" content="<?php echo $_metaDescription ?>" />

This example checks that the current frontend view is a product, and if a product (long) description exists strips the tags from the description text and sets the meta description to this text.

You can modify this further to include product name, sku etc.

Note the description should optimally be between 150-160 characters, so you should check the output of your meta description to see if it is meaningful and within these limits.

I would advise against adding the description text to the meta keywords field. Google pretty much ignores the meta keywords content these days, and if you want to try and use this for SEO keywords then a single relevant keyword or search phrase will have more SEO significance than the product description text.

More information regarding modifying the meta content can be found here

http://blog.gaiterjones.com/magento-seo-generate-meta-description-tags-automatically/

Credit goes to @tahir-yasin mention this is due to Creare SEO, but you don't need to uninstall this extension. Go to your Settings>Configuration> In CREARE SEO find General Settings and change " Disable Meta Keywords Tag and Empty Meta Description Tags?" to "No" your problem will be solved..