First sync

Will connecting break my live shop? No.

The first step after a connection pulls listings that are already selling into the canonical catalogue and keeps the link to the listing on Shopify. Nothing is overwritten on the store. Pushing a product back to Shopify is a separate action you choose from that product's Channels tab.

What the first sync does

A pull copies inward. Live titles, variants, and prices on Shopify stay as they are. SellingIO now has a canonical record mapped to each pulled listing, so later stock updates know which listing to touch.

A push copies outward. You pick what is written to Shopify. Connection alone does not push.

Pull and push are defined in key concepts.

How to check it worked

Listings that were already on Shopify show in SellingIO, mapped to those listings. Opening the live shop, those listings look the same as before you connected.

You expected the live shop to change

It should not have. If a listing on Shopify changed and you did not push, that edit did not come from the first sync. Check whether you pulled, pushed, or only connected.

Listings did not appear in SellingIO

The pull needs a completed connection. Confirm the install finished in install the Shopify app. If the store is connected and listings still do not show, see troubleshooting.