If you use Klaviyo, you can easily send specific emails to customer segments created in Loyal. Here is what you need to do:
In Loyal
Go to Loyal -> Settings to enable automatic analysis and automatic customer tagging
Make sure the Klaviyo app is installed and connected to your store
In Klaviyo
Go to Klaviyo -> Audience -> Lists & Segments and Create New Segment
When creating a new segment, use Definition - > Properties about someone.
Then select Shopify Tags -> contains -> loyal app: {name of segment}
Keep type as a List and Create a new segment
Go To Flows and Create New Flow -> Create from Scratch
As a Trigger, select the just-created Segment
Choose Email as an Action
Set the email content and enable Flow
How it works
Loyal runs regular automatic analysis every Sunday. When customers move between segments, Loyal updates the Shopify tags "loyal app:....". So these tags are always up to date. This change of tag can trigger your defined Flow in Klaviyo. We recommend running specific flows, especially for customers that entered segments "Loyal At Risk" and "About To Sleep" to motivate them to another purchase.
Video tutorial