You'll be able to connect your Shopify store to Roku Ads Manager after downloading the Roku Ads app on Shopify. Once downloaded and connected, you can send events data back to Roku.
Read this article for more information on using the Roku Ads app on Shopify
Why send Shopify events to Roku Ads Manager?
By sending marketing events from your Shopify app to your Roku Ads Manager account, you can potentially improve the effectiveness of your ads and track their performance more accurately.
How to send events:
Install the Roku Ads Shopify app.
Connect the Roku Ads Shopify app to your Roku Ads Manager account.
In Roku Ads manager, go to the Data Sharing tab.
Choose an event group and click Connect.