Here is a screenshot of Google Analytics Overview Page:

From the image above, we can see an “exclusive overview” by Google to help us tracking and knowing our visitors:
1. “Visits and Pageviews” reports number of visitors and page views per day.
2. “Visit by New and Returning” reports the percentage of new and returning visitors.
3. “Geo Map Overlay” reports where the visitors are from (country, state, region).
4. “Visits by Source” reports sources where the visitors came from (search engine, blog, etc).
Google Analytics is free service from Google. After signing up, you need to place a code in your blog so that Google Analytics can start analyze your blog stat. Using Google Analytics will help you maintain blogs in professional way.