Track UTMs in OptinMonster Campaigns with UTM Grabber

UTM attribution overview Pass HandL UTM Grabber attribution into OptinMonster opt-in campaigns using hidden fields, campaign cookies, and UTM passthrough on success redirects. Approach 
 
 Add hidden fields to your OptinMonster campaign matching UTM Grabber parameter names 
 UTM Grabber fills matching fields automatically via its form population logic 
 On success, OptinMonster can redirect to a thank-you URL. Add utm-out on the redirect target to carry UTMs along. 
 
 Hidden field mapping 
 Create hidden fields named utm_source , utm_medium , utm_campaign , gclid , fbclid in your campaign settings. UTM Grabber scans input[name] and populates from cookies. 
 See Hassle Free Implementation for automatic field population.