Ecommerce shopping cart software is used to enable you to sell your products to your target market worldwide with ease and simplicity of use that will surely satisfy your buyers and yourself as well. This can either be utilized as an independent piece or as a part of an ecommerce website development package. If you already have an existing ecommerce site, you can opt for the independent piece of software, since you only have to integrate this to your own site. However, if you are just starting your website, you are better off with the ecommerce shopping cart software that is included as a feature in the ecommerce web creation package.