How to make a selling product website different?
 

One of my brothers and I cooperate to built a selling product website (). We are on the way to launch it. In my country Viet Nam, there are many companies doing that and being successful. I think customers still want to have more chances to choose so we still have chance to be successful. However, I think we start quite late. I would like to make my site differ from others to impress customers. However, I'm still stuck in finding way. Most of the site sell vouchers which help customers save money when they buy online. Some allow people booking products online and will send the item when they get money transfer. I don't know if there is any good way from other country. I really want to build a stable business to have abilities support my parents. Please help!! Thanks!!