If you use joomla CMS, and your joomla site build instantly from fantastico menu in your hosting server, Then Joomla produces some meta tags by default, as a sample, just open up your site in your favourite browser (ex. mozilla) then, right click and view page source , then you will find this meta tag :
<title>your title site</title>
<meta name="description" content="your description sites" />
<meta name="keywords" content="your keyword sites" />
<meta name="Generator" content="Joomla! - Copyright (C) 2005 - 2007 Open Source Matters. All rights reserved." />
you can change Title, Descriptions, Keywords via administrator pages, but you can't change generator meta tag, well not really..
Here is the way to remove / edit your meta tag Generator by joomla
All you have to do is open file "version.php" in "includes" directory,
and Edit These Lines :
var $PRODUCT = 'Joomla!';
var $COPYRIGHT = "Copyright (C) 2005 - 2007 Open Source Matters. All rights reserved.";
Save the file, and refresh your site. The line of Meta tag generator Joomla , should now be Changed.
