January 22nd, 2013
Quantcast (http://www.quantcast.com) is a media measurement service that lets advertisers view audience reports on millions of websites and services. Quantcast Tag Plugin is a simple Plugin for Joomla! 2.5 used for inserting Quantcast Tag tracking code to the Joomla site as a Plugin, without the need to edit any file from your site.
Register a free account at http://www.quantcast.com, get your Property Code (or P-Code), generally something as p-1Mj5Q5h5g_gef, install the plugin, and in the plugin’s admin interface insert this value, and publish the plugin. Quantcast will start collecting data about your site instantly.