Know about your WordPress: StatPress
If you want to know how many people visit your website during past 30 days, you’d better install StatPress, which provide rich function about statistics of visitors.
1. Download this Plugin from: http://wordpress.org/extend/plugins/statpress/
2. unzip, upload by ftp to your plugins directory
3. Activate
4. Click StatPress in you main tab to view the result of analysis
5. dafault setting is OK. You don’t need change anything. If you want, you can update this plugin online by clicking StatPressUpdate.