Search of product should be easy for user. Make purchasing easy to customer in few steps like View Product–> Add-To-Cart –> checkout/login.
Now Concentrate on Checkout page get only basic information from customer,otherwise he will get hectic to fill-up unwanted fields in checkout form. after purchasing tracking of order should be visible for customer. Ad payment gateway which is secure and well-known to customer.
Take a good partner for delivery of product or start your own shipping. Make sure product will be delivered within time or on-time delivery is important. Be flexible to deliver your product on customers demand. You need to research/study on this step. In this step return policy, Email notification, SMS notification should be included in your service.
Above steps should be prepared before launching of your website.
Before launching and after launching SEO, Email Marketing, SMS marketing, Social Marketing plays vital role in your online business.
Product updation in stock products, out of stock products, offers on particular product are very important to keep customer ON.