Clicking on Settings menu at the left menu bar or Settings in the middle of dashboard page take you to the settings page.
Here you can configure various app's settings.
Re-Configure Etsy account details – If you need to re-authorize connected Etsy account, choose this option.
Sync Settings - you can set inventory and price synchronization from Etsy using this setting.
Other Settings -
Automatic SKU Creation – If you choose this option, the app will automatically generate SKUs of the products.
Threshold Inventory – This option will allow you to keep the Etsy item active if the quantity on Shopify is same or above threshold Inventory.
That means when the quantity of Shopify product is less than threshold inventory defined here, the related Etsy item will be ended on Etsy.
Pricing Mark-up – If you want to keep the pricing little bit higher than from Shopify store, you can configure this option.
Generally you may want to use this option to cover the Etsy listing fees.
Import Orders From Etsy – Choose this option if you want to import Etsy orders to Shopify.