The default way your page title appears in the browser’s window title bar and in search engine results, such as google.com, is as follows:

Drupals default page header format

(Site front page) SITE NAME | SITE SLOGAN

(All other pages) NODE TITLE | SITE NAME

This is widely regarded as the best approach, as people reading English read from left-to-right and are usually using a search engine to search for a topic, rather than a specific site. Therefore, it’s arguably more ergonomic to leave the Drupal default.

Changing how your page titles are constructed

      1.Open your page.tpl.php file in a text editor

      2.At the very top of the file, you should see the following line

<title>
<?php print $head_title; ?>
</title>

      3.Change to:

<title>
<?php
print "$title | $site_name | $site_slogan";?> 
</title>

      4.As the variable names suggests, that re-orders your page tite to read: NODE TITLE | SITE NAME | SITE SLOGAN

      5.Upload your edited page.tpl.php file to your active theme folder for the changes to take effect.

For a full list of all the variables available, visit the page.tpl.php overview page in the phptemplate section of the handbook at drupal.org - http://drupal.org/node/11812