In this video, I show you how to track Mailchimp lead form submissions using Google Tag Manager (GTM) step by step. Mailchimp forms are often embedded or popup-based, so you can’t always track them directly with normal form triggers. That’s why I use a lightweight listener code inside a GTM Custom HTML tag, and I fire it on All Pages. The main goal is simple: when someone submits (or clicks through) the Mailchimp form, I push a clean event into the dataLayer so GTM can catch it reliably. After the dataLayer event is active, I test everything in GTM Preview Mode (Tag Assistant) and then extract the important parameters like accountId, campaignId, variationId, campaign name/label, etc. From there, you can send the same event to any ad platform you want—Google Ads, Facebook (Meta), TikTok, LinkedIn, Pinterest—whatever you are using for remarketing and conversion tracking. I also mention two ways to capture user information: either scraping method (I have other videos on that) or a hook/JS approach where you collect the data and send it to your target platforms. Once the event is available in GTM, setting up Google Ads Conversion Tracking or a Facebook Pixel custom event is a straightforward process.