If your supplier has just joined, or you've moved your product catalog to a new store, you may want to connect products automatically by SKU.
The Variant Sync tool will automatically detect potential supplier matches, and provide a UI where you can connect them in bulk.
If multiple supplier products have the same SKU, you'll need to select which you'd like to connect your product to.
If you've recently modified your catalog, or your supplier just made their products available, use the "Refresh matches" button.
To confirm a match, select the checkbox next to your product row and click "connect matches".