[hqnetwork]

As far as META data, you should edit /templates/meta.tpl

To Edit the Description:

{if $meta_description neq ""}
	<meta name="description" content="{$meta_description}" />
{else}
	<meta name="description" content="This is the description of my site" />
{/if}

Change the meta description AFTER the {else}

{if $meta_keywords neq ""}
	<meta name="keywords" content="{$meta_keywords}" />
{else}
	<meta name="keywords" content="keywords go here,best,practices,widgets,games" />
{/if}

Change the meta description AFTER the {else}