Is it possible to get the UTM values of a user and keep them until the user submit a form so that it will reflect in the Contact details? using webhook API?
UTM parameters are tracked by the sources report in your traffic analytics. It's not typical to try and 'store' UTM parameters, since they're intended use is to track where traffic to a particular asset (e.g. landing page) is coming from. If a visitor clicks two separate tracking URLs to the same content, they'd theoretically have multiple UTM values.
Check out the following blog post on using UTM parameters in HubSpot:
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