Some products are more information-intensive than others. For example, selling books online is a lot different than selling cars. Customers who are shopping for a car require a lot more information than customers who are shopping for books. If the products you are selling are high-involvement goods and customers require a lot of information before making a purchase decision, you need to take this into account when creating your online store. Consider the issue of price.
Some industries are more price-sensitive than others.
Depending on your industry, shipping may be a critical success factor. For example, if you are selling chocolates, you will have to arrange for special shipping containers so that you can ship your chocolates to customers without them melting. These are just a few examples of critical success factors that may affect your industry. There are many others. Get out a piece of paper and list all of the critical success factors you can think about for the products you intend to sell.