1) Get your API KEY from MailChimp

- Log in to your MailChimp account
- Click on your avatar, then on ACCOUNT
- Locate the Extras menu and click on "API Keys"
- Copy your API Key

2) Open the Integrations Menu on Giveaway Ninja

- Log in to the Dashboard
- Click on SETUP > INTEGRATIONS
- Expand the Mailchimp section and click SETUP

3) Paste the API Key

Paste the API Key previously copied from your Mailchimp Admin and select a list.

4) Enable the Mailchimp integration

Edit your Giveaway, switch to the SIGN-UP FORM TAB, scroll to the Integration section, and set the "Export collected e-mails" dropdown to Mailchimp: