Shop Sync is a prime integration when using Mailchimp. It assist the client with using the purchase data in your store to personalize your marketing. This will also help with showing recommended products, trigger automations(different emails and forms). The Shop Sync integrated with Mailchimp will allow the client to segment customers and put them into groups.
Mailchimp and Shop Sync together can help the client determine the numbers his store is bringing and and allows them to manage their customers according to the things they buy. It will also allow you to see products bought, and orders done at your store. The wonderful thing about this integration is that you can distribute out you customers in groups, tags, and segments that will help you to send out different emails and forms.
Here is the link to the integrations page on Mailchimp: https://mailchimp.com/integrations/shopsync/
If you need any support with Shop Sync here is a link: https://support.shopsync.io/
Below is a video link explaining ShopSync with Mailchimp: https://mailchimp.com/help/shopsync-webinar/


