The Webstore Manager has an option for inserting Google AdWords Conversion Tracking Code into your webstore Your Google Adwords conversion ID, the conversion format and the conversion label are required.
You can sign up for Google Adwords at adwords.google.com to get the conversion code:
The Code looks like this:
<!-- Google Code for Sale Conversion Page -->
<script type="text/javascript">
/* <![CDATA[ */
var google_conversion_id = 964999351;
var google_conversion_language = "en";
var google_conversion_format = "1";
var google_conversion_color = "ffffff";
var google_conversion_label = "Itx6CNGGG1YQ78GAzAM";
var google_remarketing_only = false;
/* ]]> */
</script>
<script type="text/javascript" src="//www.googleadservices.com/pagead/conversion.js">
</script>
<noscript>
<div style="display:inline;">
<img height="1" width="1" style="border-style:none;" alt="" src="//www.googleadservices.com/pagead/conversion/964698351/?label=Itx6CNG1q1YQ78GAzAM&guid=ON&script=0"/>
</div>
</noscript>
To insert this on your site, go to WebStore Manager then select Marketing from the top Menu and select SEO. Near the end of the page, you will see:
Enable Google Adwords Conversion Tracking
Tick the box
Enter conversion_id, conversion_format and conversion_label from the code above.
Click Save