You can generate Top 10 lists by changing the dates to your liking using the dropdown menu (i.e. one day, 7 days, 1 month) and then hitting "Show Top 10". This will show you the Top 10 referring keywords that led to your page across all search engines, your Top 10 referrers, and Top 10 requested pages. While it also shows you browsers and operating systems, you're probably more interested in the first three items.
Why do you care who is viewing your blog and what they are viewing? Simple - you want to use this information to tweak your blog to give visitors more of what they want. If you are giving equal weight to four different topics and people are really only interested in two, you can use this information to change the structure of your blog. My next post on the subject will be on how to form a Wassup Anonymous group because I know I'm addicted!