What can I use for something like Google web analytics for a Drupal website?
Drupal have the Google Analytics too


  Adds the Google Analytics web statistics tracking system to your
  website.


also install the Google Analytics Reports module to track within the site itself.


  Google Analytics Reports provides graphical reporting of your site's
  tracking data. Graphical reports include a dashboard widget for
  admins, a small path-based report in blocks, and a full path-based
  report.