Google adwords conversion tracking

You can copy and paste the following piece of code in your success.phtml

/app/design/frontend/yourpackage/yourtemplate/template/checkout/success.phtml

<?php
$orderId = Mage::getSingleton('checkout/session')->getLastOrderId();
$order = Mage::getModel('sales/order')->load($orderId);
$total = (float)number_format($order()->getSubtotal(),2);
?>

<script type="text/javascript">
/* <![CDATA[ */
var google_conversion_id = 'CONVERSION_ID';
var google_conversion_language = "LANG_CODE";
var google_conversion_format = "FORMAT";
var google_conversion_color = "COLOR";
var google_conversion_label = "LABEL";
if (<?php echo $total?>) {
    var google_conversion_value = <?php echo $total?>;
}
/* ]]> */
</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/CONVERSION_ID/?value=<?php echo $total?>&amp;label=LABEL&amp;guid=ON&amp;script=0"/>
</div>
</noscript>

Make sure you change the following variables in the above code -:

• CONVERSION_ID (e.g. 999999999)
• LANG_CODE (e.g. en)
• FORMAT (e.g. 1)
• COLOR (e.g. #ffffff)
• LABEL (e.g. -9C8CICMuggQ4O_B1wM)

If you are not confident regarding the above approach then you can use the following module which would easy to configure instead of fiddling around with the code

http://www.scommerce-mage.co.uk/magento-google-adwords-conversion-tracking.html

Hope it helps!

As Step1:

you need to add conversion code on ordee success file

app/design/frontend/yourpackage/yourtemplate/template/checkout/success.phtml

if file no exits then:

copy success.phtml from

app/design/frontend/base/default/template/checkout/

and pasted

app/design/frontend/yourpackage/yourtemplate/template/checkout/

add your code on new success.phtml

in this file you can order id using below code

$this->getOrderId()

OR: check this extension http://www.magentocommerce.com/magento-connect/luka-google-adwords-conversion-tracking.html