Step 1: Click on the Manage Site button in the top navigation bar.
Step 2: Click on the Get Site Code button on the top right corner of the screen. Copy the code.

Step 3: Login to your Weebly account, and locate the site in which you want to add your MailMunch forms. Click on the Edit Site button as shown below.
Step 4: Click on the SETTINGS tab present in the top bar.
Step 5: Click on the SEO option available in the left panel of the dashboard.
Step 6: Scroll down and locate the Header Code. Paste the MailMunch Site Code that you copied earlier.
Step 7: Click on the Save button, and then click on the Publish button.
That's it! The form you created in your MailMunch account is now live on your Weebly page.