Aria here, I'm on the Social Care team at Shopify.
Direct traffic is when your visitor types in your web address to go straight to your store. Perhaps they previously found you via Social Media and remembered your domain name when they accessed your store from a different internet connection.
You can find out more about your analytics in this guide.
Let me know if you need anything else. How is your business going?
Social Care Guru
No, traffic from google will be presented in Google Analytics as "google / organic", and that's how you measure the results of your SEO campaigns.
If you read GA report, direct and google organic are separated clearly.