Configure your options before sending your products catalogue to eBay:
eBay Authentication: click on the button and connect to your eBay account to establish the connection. For eBay UK and DE, it enables the use of eBay'sClick & Collect feature (if you activated this service).
Adapt you SKU for multi-country (optional): if you sell your products on different eBay countries, your products identifiers must be unique for each country. If you want to sell your products on different eBay websites and do not have product identifiers for each country, enable this feature to create unique ones for each country.