Source parameter feature of OpenX can be used to target ads to specific sections of a website. In this techinque zones are labeled using Source parameter. The word entered in the source parameter decides which ads to display.Source parameter can be added in two ways in invocation code.
Go to invocation code section of a zone and select Javascript type of invocation code. Enter the value of source in Tag settings and click Refresh. Now the sports will be added as the source parameter in the invocation code. You can add source parameter for all kind of invocation codes. Here we have taken the example of the JavaScript type of invocation code.