Analytics 10 Help, October 2013
The WT.mc_id parameter identifies clickthroughs to the campaign you want to track.
If you use Webtrends SmartSource Data Collector (SDC) or Webtrends Analytics, add this parameter to the META tags on the web page you want to tag. If you do not use SDC or Webtrends Analytics 9 to collect web activity data, you can instead pass the WT.mc_id parameter as part of the page URL.
Where you decide to place the WT.mc_id parameter depends on your site configuration as well as the kind of campaign you are tracking. One solution is to place the WT.mc_id parameter on each campaign's landing page, creating a redirect to the home page if necessary. However, you can also place the parameter in the URL of a link on the referring page or within an HTML-formatted email. For example, when placing a campaign on an external site, you can attach the parameter to the URL as shown in the following example:
Using the WT.mc_id parameter this way eliminates the need to develop unique landing pages for each campaign. You can have multiple campaigns leading visitors to one landing page, but Webtrends Analytics uses the WT.mc_id parameter to differentiate where individual visits are coming from.
Typically, email campaigns, affiliate campaigns, and paid search campaigns are tagged using the referring URL. Other campaign types, such as radio or print campaigns may require you to specify a unique landing page, because they rely on the user to enter the URL in a browser window. However, your campaign and site design should determine the parameter placement.