This article shows how to configure Mailchimp integration on your website using the MC4WP Plugin (https://wordpress.org/plugins/mailchimp-for-wp/). You will learn how to add the Mailchimp API key to this plugin, choose the correct list to sign up visitors, and rename texts such as placeholders or notifications after a successful or unsuccessful subscription.

1. Start by creating your account at https://mailchimp.com/ 

2. Generate an API Key by following the official documentation: https://mailchimp.com/help/about-api-keys/

3. Add the API key to wp-admin > MC4WP > API Key as shown below. After saving, you will see the status "Connected" and the list names:

4. Important: Mailchimp will not automatically use any of the lists. Important: Mailchimp will not automatically sign up users to your account because it is based on different listings. Even if you have only one list on your Mailchimp account, it will not be automatically selected by the plugin. You need to check it manually in MC4WP > Form under "Lists this form subscribes to" and click "Save Changes." If you do not do this, the subscription button will not work as it will not know where to sign people up.

5. Now, new users will be correctly added to your Mailchimp list if they fill out the widget form field. If you wish to customize it further, such as changing placeholder texts or notifications users see after filling it out, please visit MC4WP > Form > Form Code. You can change the placeholder text by editing the placeholder attribute, for example, changing placeholder="Email"

 to placeholder="Enter your email address":

6. Check other tabs for additional options, such as different notifications.