Setting MailChimp API:

Go to Dashboard >> MailChimp For WP >> MailChimp
>> Setting your API Key then click “Save Changes“. To
learn how to get API key, you can refer document of
MailChimp.

Create MailChimp Form:

Go to Dashboard >> MailChimp For WP >> MailChimp
>> Forms:

Demo Hotel WordPress theme has a style MailChimp form available, just copy and paste below content into
your MailChimp form:

SUBSCRIBE