To use the basic tracking code,

For example:Once enabled, your forms will start tracking the information available from the webpage's URL and saves it in the browser cookie. The default cookies will be stored as listed below.
Cookie Name Category utm_source Marketing/Tracking Cookie utm_medium Marketing/Tracking Cookie utm_campaign Marketing/Tracking Cookie utm_content Marketing/Tracking Cookie utm_term Marketing/Tracking Cookie If you have defined custom parameters, then they will also be stored in the cookies. For example, if you are running a promotion, you can track the offer code used with a UTM parameter utm_offer_id.

Note: