How do I add the API key for Mailchimp-Vtiger CRM?

API key establishes a connection between Mailchimp and Vtiger CRM.
Note: Keep the Mailchimp and Vtiger tabs open to add the API key.
 
Follow these steps to add the API key:

1. Log in to your CRM account.
2. Click the User Menu on the top right corner of the CRM screen.
3. Select Settings.
4. Go to Extensions.
5. Click Mailchimp.
6. Click the Add API Key button.
7. Go to Mailchimp to find or generate your API key. Click here for the steps.
8. Copy the API key.
9. Paste it in the Mailchimp Credentials Settings pop-up in the CRM. 
10. Click Save.

After integrating, you must create a campaign in Vtiger and link contacts to it. To learn how to do this, click here.