Hi Emil,
Thank you for your answer.
This could help indeed, but this is not what I'm looking for.
Actually, I would like to have the possibility to have a field for leads that would tell me the referring traffic source.
Let's say I'm running a campaign with LinkedIn Ads, and redirecting people to my site with UTM parameters in the URL.
When they convert by filling the form (created with 365) or subscribes to the newsletter, it would be good to have a field with that UTM source populated, so I can retarget in a more effective way by only selecting people coming from that LinkedIn campaign.
Right now, I don't now where leads are coming from, whether it's organic or paid advertising