To use the advanced tracking code,

If your website URL contains UTM parameters and custom parameters (defined by you in Zoho Forms), the tracking script will capture this information and save it as a browser cookie, as shown below.
| Cookie Name | Category |
| utm_source | Marketing/Tracking Cookie |
| utm_medium | Marketing/Tracking Cookie |
| utm_campaign | Marketing/Tracking Cookie |
| utm_content | Marketing/Tracking Cookie |
| utm_term | Marketing/Tracking Cookie |

When there are no UTM parameters available in the website's URL, the tracking script checks for gclid. If a gclid parameter is available in the website's URL, then the source is captured as shown below when the entry is submitted.
utm_source=Google Ads
utm_medium=cpc
utm_campaign=(not set)
utm_source= <search_engine>
utm_medium=organic
utm_term=(if available as a query string)
utm_source = <referrer domain>
utm_medium = referral
If you embed your form on a WordPress website and use the Smush plugin to lazy load images and optimize website performance, you must exclude Zoho Forms iframe from Lazyload for the tracking code to work.
To exclude the iframe from lazy loading, add class="no-lazyload" while embedding the form as an iframe on your WordPress builder.