Banner iFrame

<iframe id="myIframe" src="//adservingdomain.com/iframe.php?idzone=1234567&size=300x250" width="300" height="250" scrolling="no" marginwidth="0" marginheight="0" frameborder="0"></iframe>

<script>

let dataKeyword= document.getElementsByName('keywords')[0].getAttribute('content');

document.getElementById('myIframe').src=(document.getElementById('myIframe').src+"&tags="+dataKeyword);

</script>