Syncing orders between the two apps would keep your sales inventory up to date with each other. However, unlike with product syncing, you are only able to do a one-way sync with orders. On the order syncing setting tab, you have the option to choose a sync between: Vend to WooCommerce, WooCommerce to Vend or disable the feature. See Syncing Options for WooCommerce and Vend for more information.
What do I need to know about syncing orders with Vend/Woocommerce?
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