Web Analytics in SharePoint Server 2010 has been discontinued and is not available in SharePoint 2013. Analytics processing for SharePoint 2013 is now a component of the Search service. to Get site Usage Reports is become more detail and useful.
To Get Site Usage Report Goto Site Setting in Top left gaer icon.
Click on Popularity Trends under Site Administration
Use default Template
there also more feature under Site Collection Administration in site settings
Audit log reports
Popularity and Search Reports
More HelpFul links http://social.technet.microsoft.com/wiki/contents/articles/17705.sharepoint-2013-web-analytics.aspx
