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You can configure the API Manager to track runtime statistics of API invocations through Google Analytics (http://www.google.com/analytics). Google Analytics is a service that allows you to track visits to a website and generate detailed statistics on them.

This guide explains how to setup API Manager in order to feed runtime statistics to Google analytics for summarization and display.

1. Setup a Google Analytics account if not subscribed already and receive a Tracking ID, which is of the format "UA-XXXXXXXX-X". A Tracking ID is issued at the time an account is created with Google Analytics.

2. Open $APIM_HOME/repository/conf/api-manager.xml. Enable the <GoogleAnalyticsTracking> element and enter the Tracking-ID.

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   language html/xml
   <GoogleAnalyticsTracking> <!-- Enable/Disable Google Analytics Tracking --> <Enabled>false</Enabled> <!-- Google Analytics Tracking ID --> <TrackingID>UA-XXXXXXXX-X</TrackingID> </GoogleAnalyticsTracking>

3. Save the file and restart the API Manager instance.
4. API Manager is now integrated with Google Analytics. A user who has subscribed to a published API through the API Store should see an icon as Real-Time after logging into their Google Analytics account. Click on this icon and select Overview.
5. Invoke the above API using the embedded WSO2 REST Client (or any third-part rest client such as cURL).
   

   Real-time statistics
   
   

6. This is one invocation of the API. Accordingly, Google Analytics graphs and statistics will be displayed at runtime. This example displays the PageViews per second graph and 1 user as active.
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   Reporting statistics

   Google analytics reporting statistics take more than 24 hours from the time of invocation to populate. Shown below is a sample Dashboard with populated statistics.

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   There are widgets with statistics related to Audience, Traffic, Page Content, Visit Duration etc. You can add any widget of your preference to dashboard.