Google Analytics is a statistics service provided free of charge by Google. This plugin simplifies the process of including the basic Google Analytics code in your blog, so you don't have to edit any PHP. If you don't have a Google Analytics account yet, you can get one at analytics.google.com.
In the Google interface, when you "Add Website Profile" you are shown a piece of JavaScript that you are told to insert into the page, in that script is a unique string that identifies the website you just defined, that is your User Account string (it's shown in bold in the example below).
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">Once you have entered your User Account String in the box below your pages will be trackable by Google Analytics.
Congratulations! You have just activated Google Analytics - take a look at the source of your blog pages and search for the word 'urchin' to see how your pages have been affected.
"; } // end analytics_warning() function warning() { echo "Google Analytics is not active. You must enter your UA String for it to work.