Hi there @Carolee,
Happy to help!
You will need to setup a system to pass your properties into Klaviyo.
To clarify, is this information already in their Klaviyo profiles that you can see already? As Shopify tags sync as custom properties, you should call on the Shopify tags like this and segment accordingly.
However, Shopify varies on how it’s tags are synced into Klaviyo at times and if these tags are not readily available, then you will need to set up an API call which will bring in these custom properties into your Klaviyo account.
Thanks for participating in the Community!
-Taylor