An ecommerce website is a site that sells something online. A number of products and services can be sold online and there are several ways of doing so. If you are having an ecommerce website built then you need to consider what payment gateway system you would like to use. Probably the easiest one to integrate is Paypal which does not require a merchant ID just a PayPal account. Although this is the easiest in terms of integration (which also means the cheapest) the costs incurred from PayPal themselves can be quite high compared to other payment gateways.

Security is vital when it comes to ecommerce websites as if the site does become victim to a cyber-attack, you need to make sure that sensitive data such as payment details etc cannot be accessed. This is why it is essential that you get a highly experienced web programmer to build the site for you and thoroughly text it prior to setting it live to the public.