All the reports are accessible from the Dashboard screen.  The Dashboard screen is accessible when the Dashboard icon is on the top left of the screen:

Clicking on this icon takes you to the Dashboard page.   The left side of the page shows the sites available in the account. 

In this case the Hilton Hotel site is selected.  This selection tells the application to show the reports for the Hilton Hotel site.  
The reports can be see below the Sites listing.