To use any of the above modules, you need to connect your MailChimp account to Integromat. If you do not have a MailChimp account yet, you can create one at MailChimp.com
To connect your MailChimp account to Integromat, follow the general instructions for Connecting to services. When creating a connection, you will be redirected to the MailChimp.com website where you will be prompted to enter your login data.
Once you have entered the required data, you will be redirected back to the Integromat administration page. Now, you can continue creating your scenario.
If you want to use dynamic content in your campaign templates, you can achieve it by creating Editable content areas and adding the Edit campaign template content area module to your scenario. Note: Only Custom HTML templates can be edited. More info can be found here. Once you create the desired template and define editable content areas, the module Edit campaign template content area will let you edit these areas in any way you like.