You can install MailMunch through Google Tag Manager. Log into your Tag Manager, and click on the Account name you want to add MailMunch to. Create New, or click on the Container that you would like to use. Follow the easy steps mentioned below.
Step 1: Click on New Tag.
Step 2: Choose a Tag Name like MailMunch.
Step 3: Select a Tag Type: "Custom HTML Tag"
Step 4: Add MailMunch Site Code
Access the Manage Site section of the domain in question to get your Site Code. Learn more about how to obtain your MailMunch site code.
Once you have copied the Site Code the code, paste it in the HTML tab.
Make sure to check "Support document.write"
Step 5: Choose the All Pages option for Fire On.
Step 6: Click on the Publish button on the top right corner of your screen.
Step 7: Click on the Publish Now button in the confirmation modal.
That's it! Enjoy Mailmunch.