Mailchimp

Step 1: Setup API Key

Step 2: Setup Form

This is code form:

<div class="ova-mc4wp-form">
  <input type="email" name="EMAIL" placeholder="Email Address" required />
  <button type="submit">
    Subscribe <i class="fas fa-chevron-right" aria-hidden="true"></i>
  </button>
</div>
<p style="display:none">
    <label>List choice</label>
    <label>
        <input type="checkbox" name="_mc4wp_lists[]" value="Ovatheme" checked> <span>Ovatheme</span>
    </label>
</p>