Google Tracking (UTM) codes are used by CANDDi and Google Analytics to identify the source of visitors coming to your website.
By embedding these tracking codes into your outbound tracking links then you can track the source of your inbound traffic in Google Analytics and you can build new streams to identify people who have clicked through this stream.
For more information:
Google Support text with more details-
CANDDi Support text about adding visitor level tracking too-
|Required. Use utm_source to identify a search engine, newsletter name or other source.
|Required. Use utm_medium to identify a medium such as email or cost per click.
|Used for keyword analysis. Use utm_campaign to identify a specific product promotion or strategic campaign.