How to setup Newsletter in Footer

1. Install MC4WP: Mailchimp for WordPress plugin.

2. Navigate to MC4WP -> Forms and add code below:

<p class="mailchimp_intro">Get instant updates about our new products and special promos!</p>
<p>
    <input type="email" name="EMAIL" placeholder="Your email address" required="">
</p>
<p>
    <input type="submit" value="Sign up">
</p>

3. Navigate to Appearance -> Widgets and add "MailChimp Sign-Up Form" widget to Footer widget area