Complete the registration step, where basic information required to complete the configuration step. like: email id, contact number then accept terms & conditions.

Then, you will be redirected to the Account section, do the following:

Import products from your seller center:
(a). Connect your account from the marketplace from where you want to import the products. (you can take help from the Help button while connecting account for any confusion).
(b). import the products on the Multichannel Importer app and then upload it to the BigCommerce store from Import/Upload section.

Import products from eBay Affiliate:
(a). Connect your eBay affiliate account to import the products.
(b). Go to the eBay affiliate tab in Import/Upload section.
(c). Then Import the products on the basis of “Item Id“, “URL” and “Search“.
(d) Once products imported, then upload it on BigCommerce from Import/Upload section.

Import Products through CSV:
(a). Go to Import/Upload section and then select the CSV upload option.
(b). Upload the CSV, map the corresponding product fields.
(c). Upload the products on your BigCommerce from Import/Upload.

FBA order Management:
Connect your FBA account to manage BigCommerce orders.