Features of GA are availabe as Views.Three views are available;Executive,Marketer and Webmaster.I'll explain Executive View first.The following are the features available in Executive View:
This includes Reports on Number of visits and Pageviews,A World map to display from which regions the visits are coming in,and New and returning visits.
This view gives you the data on whether the number of visits have increaed or decreased over a particular time frame.
Gives information on the marketing efforts taken for your domain.How the top keywords,sources and Campaigns have affected the popularity of the site.
This feature gives you information on how the content on your website has helped in retaining visitors to your site.Again this is for a set time frame and gives you comparison data in weeks.
When one chooses the Webmaster view you get some interesting stats like Browser usage,Platform info,Hostnames and other parameters of your visitors .
All of the above mentioned reports can be exported to plaintext,XML or MS Excel worksheets.You can also set the date range for harvesting the stats to fill in your reports.
All in all this is a very good statistics service which can be easily implemented to all the pages on your site which you need to keep track of.It comes with chokeful of features and above all as is in all things Google it's free!A little overkill for a blog which nobody reads but I'm having some fun exploring GA's features.
I'll rate it 4.5 stars out of 5.