Using Segments, you can target your audience based on the events they perform on your website, like placing orders, abandoning carts without checking out, etc.
If you wish to segment your customers based on their Shopify events,
Go to Marketing Automation > Segments > Create Segment.
Name the Segment.
Under Segmentation criteria, select Shopify.
Select the action as “Performed” or “Not performed”
Select the Shopify event from the list, frequency, and time.
List of Shopify events
Here is a sample Shopify event configured for customers who’ve initiated checkout in the last 24 hours but haven’t purchased yet.