Once you submit your sitemap to Google you get to see exactly where your website appears for various search terms. For example, the website below appears 10th in Google's search engine rankings for the term 'bill gates beta testing'. Plus, Google will also tell you how many people click your website for these search terms.
You can then compare this data by country so you get to see which search terms are the most profitable and which search terms you should be focusing on to attract more visitors to your website.
Yahoo and MSN also provide similar feedback including who links to your website, and any problems they experience when adding your website to the search index.
