NotionCommerce is an e-commerce generator based on Notion. So let's say you sell t-shirts and your product data is stored in a Notion database. If you give NotionCommerce access to that database and it will generate the e-commerce for you.
We are currently focusing on physical products. but technically you can use it to sell any products you like.
Shopify has a large ecosystem which is suitable for most stores but NotionCommece is a very niche product for Notion lovers where your store dashboard lives inside Notion.
So if your e-commerce business is comparatively smaller, NotionCommece will probably save you & your team a lot of time from learning & managing a different tool.