This article explains how to enable tracking if your Google AdWords ad is configured to link to a Marketo landing page with a Marketo form. When the lead fills out the form on the landing page, the Google Adwords CampaignID and keyword values will be passed to Marketo through hidden fields.
Campaign Source (utm_source)
Required. Use utm_source to identify a search engine, newsletter name, or other source.
Example: utm_source=googleCampaign Medium (utm_medium)
Required. Use utm_medium to identify a medium such as email or cost-per-click.
Example: utm_medium=cpcCampaign Term (utm_term)
Used for paid search. Use utm_term to note the keywords for this ad.
Example: utm_term=running+shoesCampaignID (utm_campaign)
Used for keyword analysis. Use utm_campaign to identify a specific product promotion or strategic campaign. This can be used to capture the Adword CampaignID
http://info.mycompany.com/lp/example/PPCExample-Start-Your-Free-Trial-Now.html Tagged URL: