What connecting does
Kickflip creates a new product page on your store with your customizer on it.
You'll do this from the Connect tab of your product, once it's published. The steps are the same on Shopify, WooCommerce and Wix
→ Adding products to your online store.
What to expect afterwards
The page won't necessarily be visible to customers yet. Depending on your platform, you may still need to make it live, add it to a collection or category, or enable it on a sales channel. That's handled in your online store's admin, not in Kickflip.
Next step : Test your setup and go live →