If anyone is looking for a tutiorial on how to setup meta tags for Zen Cart, there is an excellent tuitorial available here - https://www.zen-cart.com/content.php?104 It covers nearly everything, but I am still having troouble with one issue.

Background
  1. Setting meta tags for Categories and products is extremely easy and can be done in the backend.
  2. Setting the meta tags for the home page, define pages and EZpages can be done quite easily following the guide above by editing the meta_tags.php file.


Issue / Question

How are these meta tags generated for pages that do not have specific meta tags assigned individually to them, either via the backend or by editing /includes/languages/english/YOUR_TEMPLATE_NAME/meta_tags.php? Are they generated automatically by Zen Cart per page?

For example, every page on my site that hasn't got any specific meta tags assigned to it uses a list of our website categories as the keywords and description. The automatically generated description and keyword meta tags for the following two pages:

Code:
https://www.welsh-lovespoons.co.uk/index.php?main_page=more_news&news_id=5
https://www.welsh-lovespoons.co.uk/index.php?main_page=gv_faq

is:

Code:
<meta name="keywords" content="Birthday Gifts Valentines Day Gifts Mothers' Day Gifts Christmas Gifts Wedding Favours Rhiannon Jewellery Christening Gifts Christian Gifts New Baby Gifts Engagement Gifts Anniversary Gifts Wedding Day Gifts FULL RANGE OF SPOONS 5th Anniversary Gifts welsh love spoons, lovespoons, love spoons, love spoon, lovespoon, welsh lovespoons, celtic lovespoon, celtic love spoon, cadwyn News" />
<meta name="description" content="Welsh Love Spoons : News - Birthday Gifts Valentines Day Gifts Mothers' Day Gifts Christmas Gifts Wedding Favours Rhiannon Jewellery Christening Gifts Christian Gifts New Baby Gifts Engagement Gifts Anniversary Gifts Wedding Day Gifts FULL RANGE OF SPOONS 5th Anniversary Gifts welsh love spoons, lovespoons, love spoons, love spoon, lovespoon, welsh lovespoons, celtic lovespoon, celtic love spoon, cadwyn" / >

and

Code:
<meta name="keywords" content="Birthday Gifts Valentines Day Gifts Mothers' Day Gifts Christmas Gifts Wedding Favours Rhiannon Jewellery Christening Gifts Christian Gifts New Baby Gifts Engagement Gifts Anniversary Gifts Wedding Day Gifts FULL RANGE OF SPOONS 5th Anniversary Gifts welsh love spoons, lovespoons, love spoons, love spoon, lovespoon, welsh lovespoons, celtic lovespoon, celtic love spoon, cadwyn Gift Certificate FAQ" />
<meta name="description" content="Welsh Love Spoons : Gift Certificate FAQ - Birthday Gifts Valentines Day Gifts Mothers' Day Gifts Christmas Gifts Wedding Favours Rhiannon Jewellery Christening Gifts Christian Gifts New Baby Gifts Engagement Gifts Anniversary Gifts Wedding Day Gifts FULL RANGE OF SPOONS 5th Anniversary Gifts welsh love spoons, lovespoons, love spoons, love spoon, lovespoon, welsh lovespoons, celtic lovespoon, celtic love spoon, cadwyn" />
Is this the correct way Zen Cart should be generating descriptions and Keywords for pages on my site that haven't got any specific meta tags assigned to them? Is there a way to change this so that the description is automatically generated from the page content, instead of just listing the page categories?

Thanks for any advice.