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 Adwords CampaignID
Capturing Search Engine and PPC info on Landing Pages