To track clicks, add the ;click= and ${click_plain} into the redirect string as shown below.

Timestamp variable is exchanged for ${random}.

<script language="javascript" src="http://track.adform.net/adfscript/?bn=43547;click=${click_plain}"></script>
<noscript>
<a href="${click_plain}http://track.adform.net/C/?bn=43547;C=0" target="_blank">
<img src="http://track.adform.net/adfserve/?bn=43547;srctype=4;ord=${random}" border="0" width="300" height="250" alt=""/>
</a>
</noscript>

Note: this describes the usage of external non Adform related systems and please check respective documentation for most up to date information.