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Select Get tracking ID button to proceed. You might need to accept some ToS to continue and get the code in next page.
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As an Admin you can create HTML based ads directly from your AdminCP by creating a new block, select Add Block a choosing HTML Code as the block type.
Place the Google Analytic HTML code in the code input area for the new block and set the location (where on the page you want it) and choose Controller (which page should it show on). For our screenshot below Google Analytics code is added. We chose Sitewide as the controller as we want it all over the site.
From now on, your site will be tracked with Google Analytics.