Google analytics

Google Analytics is a powerful tool for seeing information about your site's traffic.  To get started with this, try the following:
 

• Sign-up at analytics.google.com. 
• Find your tracking ID within your Google Analytics account.  It should appear like so: UA-XXXXXXXXX-X or G-XXXXXXXXXXX.
• Enter your Google Analytics tracking ID at bottom of the Admin Panel > Admin Home page, in the Google Analytics Tracking ID field.

Click Save Changes at the bottom.

Within 24 hours, you should begin to see traffic stats within your google.analytics.com account.