How to Embed a MailChimp Subscribe Form into Your Website
This explains how to embed a MailChimp Subscribe form into your website. This lets people submit their email address and join your mailing list.
This assumes you've already set up a List in MailChimp.
Steps:
Click on "Lists" along the top navigation bar
Within the List, click on "Forms"
Click "For Your Website" then "Signup Form Embed Code"
Change any settings you want to change
Click "Create Embed Code" button
Copy the embed code and paste it into your site