First, you will need to get Banggood Referral code (affiliate id).
Navigate to Banggood Affiliate Program / My Center . On that page, you can find your referral code
There are other ways to get your referral code, in case Banggood changes the look of My Center page. Go to Link Customizer . Enter Banggood URL and title for the link, then click on Generate.
Popup window will open, with a generated affiliate link. In that link, there is a part that starts with
?p=SOMERANDOMCODE (it can also be &p=...)
That code is your referral code (affiliate ID).
All you need is to copy that referral code, open extension options, go to Platforms / Big Chinese stores, and paste referral code in the Banggood field.
Then close options, find the product on Banggood you want to share, and click on the extension icon. It will generate an affiliate link for that page. Then you can use bit.ly to shorten that link (if configured) or copy and share it.