Now days start eCommerce store is the really a good idea because now days all the  user connection internet and by the help of internet you can connect all the customers easily just think a local shopkeeper is selling a product on a single area and getting sufficient revenue for his family so if you are going online so you can capture large size of marketplace and get good sells .
Require things for online store
if you are going to start your online store you need several kind of things like
Webstore - this will be your eCommerce store where user can place and see your all the products
Payment gateway - through payment gatway you can able to take online payments
logistic tie up -  after placing your order you can able to ship the product in all over world .
responsive design -  it is very important that the website should be user-friendly and responsible design as well. I.e. If anybody opens your website any device, then he can easily operate and familiar with that particular device.
Seo friendly - search engine friendly website alway helps you for getting good responsive in search engines .
social sharing tool - this helps you for marketing customers can share your products of their friend circle so there is chance to get sales easily .
coupon code system - you can able to create coupon code for your customers so they can attract with your store for buying product.
live search - this is newly upcoming feature's in internet this is provide the suggestion what user want to search .
layout customization tools - this helps you for layout customization it means you can able to customize your eCommerce website colors and all so you can always provide you a different interface to your customers .
social login - this is provide you for your customers login through social network you they can easily join your store only in one click .
and there is many more option available for more information you can check Nwebkart .