Full Serve may require access to your Mailchimp account if you have hired us to add some fancy sign up boxes to your site, design your newsletter/email marketing campaigns, or automate a newsletter generate from your blog.
The Mailchimp knowledgebase has a fantastic step by step animation of how to manage users on your Mailchimp account.
This is a great alternative to providing your account login information to a service provider. You get to choose how much access to allow. You probably wouldn’t want a service provider to have higher access than Manager. This allows them to create and send campaigns, import lists, and view reports but prevents them from viewing your credit card number, exporting mailing lists, or closing your account.
Don’t forget to remove their access after the work is done (instructions at same link above).