Currently, we track utm_medium and utm_campaign and send these values to Freshsales to be populated when the lead/contact is created for this user. This will help you in measuring and tracking the effectiveness of your marketing campaigns
To enable this, all you need to have the following fields in your Freshsales lead/contact settings:
Under 'Source Information':
Campaign: Mapped to utm_campaign. The utm parameter value should match with one of the dropdown choices for Campaign field.
Medium: Mapped to utm_medium.