Your Mailchimp campaigns will change status as you work on them. There are 3 status available: draft, scheduled and sent.
This tutorial will cover everything you need to know about each of them
It is the first status of your Campaign. It means that it was correctly created, but there are still steps that need to be taken before it can go to 'Scheduled'.
You will need to add contacts to the campaign, by following the steps described in the following tutorial:
Once you have added contacts to your campaign and if everything was setup correctly then the status of your Campaign will change to 'Schedule'.
This Status means that your Campaign was sent successfully to your contacts.
At this point in the process it is not possible to add any more leads, since the campaign is considered as completed.
If you notice that the status is still 'Draft' even after adding contacts, please review the following tutorial: