Flow structure. Segment logic. Send strategy. I've tested this across dozens of Shopify stores and it keeps working. It's free because I want you to see how I think about email before you spend a cent.
The exact flow architecture I set up in Klaviyo for new clients. Which segments matter and which ones are noise. A send calendar that balances revenue with list health. No fluff, no 47-page PDF. One clear framework you can use today.