You can create and assign MailChimp Tags from within Makerble.

What are tags on MailChimp?

Tags are a way of classifying your subscribers on MailChimp.
For example, if you run a variety of events such as cooking classes and sports tournaments, you might create two tags on MailChimp called Cooking and Sports.
Subscribers who are interested in your cooking events would be given the Cooking tag and those who are interested in your sports events would be given the Sports tag.
Whenever you send out a newsletter on MailChimp you can choose which subscribers you want to send it to, based on their tags.
So if your newsletter this month is only focused on cookery, you'd restrict it to being sent to only the subscribers with the Cooking tag.
Whereas if your newsletter the following month is for a variety of events, you would add both tags to that campaign so that people who are interested in sports and also in cookery will receive that newsletter.
Getting Started with Tags | Mailchimp

A summary of how it works

Choose your target audience on Makerble by using the Contact Filters on the New Broadcast page
Create a new Mailchimp Tag from within Makerble (find out more - opens on Mailchimp)
From Makerble: Tag your target audience with your newly created Mailchimp Tag
From Mailchimp you have two options to send a campaign. You can:
1. Either send a Mailchimp Email Campaign to the contacts who have that Tag (find out more - opens on Mailchimp)
2. Or create a Mailchimp Automation that automatically sends a sequence of one or more campaigns to contacts who have been given that Mailchimp Tag
  1. Mailchimp have two methods for creating automations; Customer Journeys (new) and Classic Automations.
  2. Find out more about how to create a Customer Journey on Mailchimp (opens on Mailchimp)
  3. Find out more about Mailchimp Classic Automations (opens on Mailchimp)

Steps: how to create and assign MailChimp Tags to contacts

Requirements:

You need to connect Mailchimp to Makerble before you can use this feature Set up the Mailchimp on Makerble integration

Press the envelope button in your top menu
You arrive in the Messaging App
Select Message Contacts
Select Broadcasts
You arrive on the Manage Broadcasts page
Press New Broadcast button
In the Choose a format dropdown menu, select Mailchimp
Select the Audience-Project using the Audience-Project connection dropdown
Once the Audience is selected the contacts will appear on the left side.
Select the contacts you want to send the newsletter to by checking the box next to the name.
You can use the De/Select All button at the top of the contacts as well to select and deselect all the contacts
On the right side, now select a Mailchimp tag from the Mailchimp tag dropdown.
You can also create a new tag by clicking the Create a Mailchimp Tag option
It will open a pop up.
Write the tag name in the text box. A default tag name will be present in the text box for the tag name. You can edit the name or provide your own.
Click the Create Mailchimp Tag button to save the Tag.
Select the tag from the Mailchimp Tag dropdown now.
Click the Save to Mailchimp button to complete the process
You can now go to Mailchimp and see that this Tag has been added to the selected contacts