Multichannel selling opens a gateway for growth. It allows your products to reach out to the customers whom you wouldn’t otherwise be able to reach out to. But as you are selling through more than one marketplace it sometimes gets difficult to keep track of the information that you’ve spread across different channels.
Where the clear benefit of multichannel sales is increased sales, the downside is the chance of overselling. But, this can be easily handled by using ExportFeed plugin for WooCommerce to Etsy as this provides orders and inventories sync functionality if you are selling on WooCommerce and Etsy.