Setting domain name - HandL UTM Grabber Guide UTM attribution overview This guide explains Setting domain name - HandL UTM Grabber Guide. It helps you capture UTM source, medium, campaign, term, content, click IDs, referrer, and landing page data and keep the marketing context needed for accurate reporting across forms, bookings, signups, and sales. For registering the cookies, we use the main domain for better accessbility. In some servers, the logic to get the main domain might fail. We highly recommend that you put the domain name in UTM Grabber Setting page as shown below. Configuring the domain also prevents the plugin from setting the internal HandLtestDomainName and HandLtestDomainNameServer cookies. See Disable HandLtestDomainName Cookies - HandL UTM Grabber Guide .