online shopping website; e-commerce site
Refers to a website where goods can be purchased online. The term 通販 is an abbreviation of 通信販売 (mail order/online shopping).
I often buy clothes on this online shopping website.
A new e-commerce site has opened.
Compound of 通販 (tsūhan, 'mail order/online shopping', abbreviation of 通信販売) and サイト (saito, from English 'site').