Online Shopping Carts let you manage your stock and let customers pick and choose from your virtual shelves.
Some e-commerce Shopping Carts are pretty simple and provide only a limited number of SKUs. This can be a problem if you intend to sell a great many items using your online Shopping Cart.
While some online shopping cart systems come with integration already in place for their preferred Payment Partners others may only support PayPal or one payments provider.
In some cases the online shopping cart software is provided to allow the system to be changed and extended by your ecommerce website partner. Occasionally shopping cart software is provided free while other online e-commerce shopping carts require a hefty fee.
The best shopping cart solutions provide good back office facilities to let you manage and stock your online shop easily so it's best to closely examine whether or not the back office is good enough for your needs.
If you want to tie your website to your marketplace sales on Amazon, ebay, Play and FNAC the good news is that multichannel ecommerce SaaS system Seller Dynamics provides powerful integration options.