e-commerce

Hello, I want to make a shop or make ecommerce for selling/buying products online so Which E-commerce Platforms are best for your business ? and nowadays, which flatforms is most popular on the world ? Any shares?

E-commerce is the buying and selling of goods and services, and the transfer of funds, over the internet using credit cards, debit cards, or checking accounts. is E-commerce important for online business ? Any comments ?